Move implementation of BrowserList onto an inner, instantiatable class, BrowserListImpl.

chrome/browser/ui/browser_list.cc

Index: chrome/browser/ui/browser_list.cc
===================================================================
--- chrome/browser/ui/browser_list.cc	(revision 146126)
+++ chrome/browser/ui/browser_list.cc	(working copy)
@@ -4,318 +4,91 @@
 
 #include "chrome/browser/ui/browser_list.h"
 
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "base/metrics/histogram.h"
-#include "base/observer_list.h"
-#include "build/build_config.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/browser_shutdown.h"
-#include "chrome/browser/lifetime/application_lifetime.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/browser_window.h"
-#include "chrome/browser/ui/tab_contents/tab_contents.h"
-#include "chrome/common/chrome_notification_types.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/pref_names.h"
-#include "content/public/browser/browser_shutdown.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/navigation_details.h"
-#include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/notification_service.h"
-#include "content/public/browser/render_process_host.h"
-#include "content/public/common/result_codes.h"
+#include "chrome/browser/ui/browser_list_impl.h"
+#include "chrome/browser/ui/browser_list_observer.h"
 
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/chromeos/login/user_manager.h"
-#endif
-
 using content::WebContents;
 
-namespace browser {
-
-// This object is instantiated when the first Browser object is added to the
-// list and delete when the last one is removed. It watches for loads and
-// creates histograms of some global object counts.
-class BrowserActivityObserver : public content::NotificationObserver {
- public:
-  BrowserActivityObserver() {
-    registrar_.Add(this, content::NOTIFICATION_NAV_ENTRY_COMMITTED,
-                   content::NotificationService::AllSources());
-    registrar_.Add(this, content::NOTIFICATION_APP_TERMINATING,
-                   content::NotificationService::AllSources());
-  }
-  ~BrowserActivityObserver() {}
-
- private:
-  // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) {
-    if (type == content::NOTIFICATION_NAV_ENTRY_COMMITTED) {
-      const content::LoadCommittedDetails& load =
-          *content::Details<content::LoadCommittedDetails>(details).ptr();
-      if (!load.is_navigation_to_different_page())
-        return;  // Don't log for subframes or other trivial types.
-
-      LogRenderProcessHostCount();
-      LogBrowserTabCount();
-    } else if (type == content::NOTIFICATION_APP_TERMINATING) {
-      delete this;
-    }
-  }
-
-  // Counts the number of active RenderProcessHosts and logs them.
-  void LogRenderProcessHostCount() const {
-    int hosts_count = 0;
-    for (content::RenderProcessHost::iterator i(
-            content::RenderProcessHost::AllHostsIterator());
-         !i.IsAtEnd(); i.Advance())
-      ++hosts_count;
-    UMA_HISTOGRAM_CUSTOM_COUNTS("MPArch.RPHCountPerLoad", hosts_count,
-                                1, 50, 50);
-  }
-
-  // Counts the number of tabs in each browser window and logs them. This is
-  // different than the number of WebContents objects since WebContents objects
-  // can be used for popups and in dialog boxes. We're just counting toplevel
-  // tabs here.
-  void LogBrowserTabCount() const {
-    int tab_count = 0;
-    for (BrowserList::const_iterator browser_iterator = BrowserList::begin();
-         browser_iterator != BrowserList::end(); browser_iterator++) {
-      // Record how many tabs each window has open.
-      Browser* browser = (*browser_iterator);
-      UMA_HISTOGRAM_CUSTOM_COUNTS("Tabs.TabCountPerWindow",
-                                  browser->tab_count(), 1, 200, 50);
-      tab_count += browser->tab_count();
-
-      if (browser->window()->IsActive()) {
-        // Record how many tabs the active window has open.
-        UMA_HISTOGRAM_CUSTOM_COUNTS("Tabs.TabCountActiveWindow",
-                                    browser->tab_count(), 1, 200, 50);
-      }
-    }
-    // Record how many tabs total are open (across all windows).
-    UMA_HISTOGRAM_CUSTOM_COUNTS("Tabs.TabCountPerLoad", tab_count, 1, 200, 50);
-  }
-
-  content::NotificationRegistrar registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(BrowserActivityObserver);
-};
-
-BrowserActivityObserver* g_activity_observer = NULL;
-
-}  // namespace browser
-
 namespace {
 
-static BrowserList::BrowserVector& browsers() {
-  CR_DEFINE_STATIC_LOCAL(BrowserList::BrowserVector, browser_vector, ());
-  return browser_vector;
+chrome::BrowserListImpl* GetNativeList() {
+  return chrome::BrowserListImpl::GetInstance(chrome::HOST_DESKTOP_TYPE_NATIVE);
 }
 
-static BrowserList::BrowserVector& last_active_browsers() {
-  CR_DEFINE_STATIC_LOCAL(BrowserList::BrowserVector, last_active_vector, ());
-  return last_active_vector;
-}
-
-static ObserverList<BrowserList::Observer>& observers() {
-  CR_DEFINE_STATIC_LOCAL(
-      ObserverList<BrowserList::Observer>, observer_vector, ());
-  return observer_vector;
-}
-
 }  // namespace
 
 // static
 void BrowserList::AddBrowser(Browser* browser) {
-  DCHECK(browser);
-  browsers().push_back(browser);
-
-  g_browser_process->AddRefModule();
-
-  if (!browser::g_activity_observer)
-    browser::g_activity_observer = new browser::BrowserActivityObserver;
-
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_BROWSER_OPENED,
-      content::Source<Browser>(browser),
-      content::NotificationService::NoDetails());
-
-  // Send out notifications after add has occurred. Do some basic checking to
-  // try to catch evil observers that change the list from under us.
-  size_t original_count = observers().size();
-  FOR_EACH_OBSERVER(Observer, observers(), OnBrowserAdded(browser));
-  DCHECK_EQ(original_count, observers().size())
-      << "observer list modified during notification";
+  GetNativeList()->AddBrowser(browser);
 }
 
 // static
 void BrowserList::RemoveBrowser(Browser* browser) {
-  RemoveBrowserFrom(browser, &last_active_browsers());
-
-  // Many UI tests rely on closing the last browser window quitting the
-  // application.
-  // Mac: Closing all windows does not indicate quitting the application. Lie
-  // for now and ignore behavior outside of unit tests.
-  // ChromeOS: Force closing last window to close app with flag.
-  // TODO(andybons | pkotwicz): Fix the UI tests to Do The Right Thing.
-#if defined(OS_CHROMEOS)
-  bool closing_app;
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kDisableZeroBrowsersOpenForTests))
-    closing_app = (browsers().size() == 1);
-  else
-    closing_app = (browsers().size() == 1 &&
-        browser_shutdown::IsTryingToQuit());
-#else
-  bool closing_app = (browsers().size() == 1);
-#endif  // OS_CHROMEOS
-
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_BROWSER_CLOSED,
-      content::Source<Browser>(browser),
-      content::Details<bool>(&closing_app));
-
-  RemoveBrowserFrom(browser, &browsers());
-
-  // Do some basic checking to try to catch evil observers
-  // that change the list from under us.
-  size_t original_count = observers().size();
-  FOR_EACH_OBSERVER(Observer, observers(), OnBrowserRemoved(browser));
-  DCHECK_EQ(original_count, observers().size())
-      << "observer list modified during notification";
-
-  g_browser_process->ReleaseModule();
-
-  // If we're exiting, send out the APP_TERMINATING notification to allow other
-  // modules to shut themselves down.
-  if (browsers().empty() &&
-      (browser_shutdown::IsTryingToQuit() ||
-       g_browser_process->IsShuttingDown())) {
-    // Last browser has just closed, and this is a user-initiated quit or there
-    // is no module keeping the app alive, so send out our notification. No need
-    // to call ProfileManager::ShutdownSessionServices() as part of the
-    // shutdown, because Browser::WindowClosing() already makes sure that the
-    // SessionService is created and notified.
-    browser::NotifyAppTerminating();
-    browser::OnAppExiting();
-  }
+  GetNativeList()->RemoveBrowser(browser);
 }
 
 // static
-void BrowserList::AddObserver(BrowserList::Observer* observer) {
-  observers().AddObserver(observer);
+void BrowserList::AddObserver(chrome::BrowserListObserver* observer) {
+  GetNativeList()->AddObserver(observer);
 }
 
 // static
-void BrowserList::RemoveObserver(BrowserList::Observer* observer) {
-  observers().RemoveObserver(observer);
+void BrowserList::RemoveObserver(chrome::BrowserListObserver* observer) {
+  GetNativeList()->RemoveObserver(observer);
 }
 
 void BrowserList::CloseAllBrowsersWithProfile(Profile* profile) {
-  BrowserVector browsers_to_close;
-  for (BrowserList::const_iterator i = BrowserList::begin();
-       i != BrowserList::end(); ++i) {
-    if ((*i)->profile()->GetOriginalProfile() == profile->GetOriginalProfile())
-      browsers_to_close.push_back(*i);
-  }
-
-  for (BrowserVector::const_iterator i = browsers_to_close.begin();
-       i != browsers_to_close.end(); ++i) {
-    (*i)->window()->Close();
-  }
+  GetNativeList()->CloseAllBrowsersWithProfile(profile);
 }
 
 // static
 BrowserList::const_iterator BrowserList::begin() {
-  return browsers().begin();
+  return GetNativeList()->begin();
 }
 
 // static
 BrowserList::const_iterator BrowserList::end() {
-  return browsers().end();
+  return GetNativeList()->end();
 }
 
 // static
 bool BrowserList::empty() {
-  return browsers().empty();
+  return GetNativeList()->empty();
 }
 
 // static
 size_t BrowserList::size() {
-  return browsers().size();
+  return GetNativeList()->size();
 }
 
 // static
 void BrowserList::SetLastActive(Browser* browser) {
-  // If the browser is currently trying to quit, we don't want to set the last
-  // active browser because that can alter the last active browser that the user
-  // intended depending on the order in which the windows close.
-  if (browser_shutdown::IsTryingToQuit())
-    return;
-  RemoveBrowserFrom(browser, &last_active_browsers());
-  last_active_browsers().push_back(browser);
-
-  FOR_EACH_OBSERVER(Observer, observers(), OnBrowserSetLastActive(browser));
+  GetNativeList()->SetLastActive(browser);
 }
 
 // static
 BrowserList::const_reverse_iterator BrowserList::begin_last_active() {
-  return last_active_browsers().rbegin();
+  return GetNativeList()->begin_last_active();
 }
 
 // static
 BrowserList::const_reverse_iterator BrowserList::end_last_active() {
-  return last_active_browsers().rend();
+  return GetNativeList()->end_last_active();
 }
 
 // static
 bool BrowserList::IsOffTheRecordSessionActive() {
-  for (BrowserList::const_iterator i = BrowserList::begin();
-       i != BrowserList::end(); ++i) {
-    if ((*i)->profile()->IsOffTheRecord())
-      return true;
-  }
-  return false;
+  return GetNativeList()->IsIncognitoWindowOpen();
 }
 
 // static
 bool BrowserList::IsOffTheRecordSessionActiveForProfile(Profile* profile) {
-#if defined(OS_CHROMEOS)
-  // In ChromeOS, we assume that the default profile is always valid, so if
-  // we are in guest mode, keep the OTR profile active so it won't be deleted.
-  if (chromeos::UserManager::Get()->IsLoggedInAsGuest())
-    return true;
-#endif
-  for (BrowserList::const_iterator i = BrowserList::begin();
-       i != BrowserList::end(); ++i) {
-    if ((*i)->profile()->IsSameProfile(profile) &&
-        (*i)->profile()->IsOffTheRecord()) {
-      return true;
-    }
-  }
-  return false;
+  return GetNativeList()->IsIncognitoWindowOpenForProfile(profile);
 }
 
 // static
 Browser* BrowserList::GetLastActive() {
-  if (!last_active_browsers().empty())
-    return *(last_active_browsers().rbegin());
-
-  return NULL;
+  return GetNativeList()->GetLastActive();
 }
-
-// static
-void BrowserList::RemoveBrowserFrom(Browser* browser,
-                                    BrowserVector* browser_list) {
-  const iterator remove_browser =
-      std::find(browser_list->begin(), browser_list->end(), browser);
-  if (remove_browser != browser_list->end())
-    browser_list->erase(remove_browser);
-}
-