Profiles: Move the Spelling system onto a ProfileKeyedServiceFactory.

chrome/browser/spellchecker/spellcheck_profile.cc

Index: chrome/browser/spellchecker/spellcheck_profile.cc
diff --git a/chrome/browser/spellchecker/spellcheck_profile.cc b/chrome/browser/spellchecker/spellcheck_profile.cc
index 9af9a1e174dc8e1086f1fef23959e7d3e4823070..e248e6a8141ff131dbb1b1bb4edb253e12bc924e 100644
--- a/chrome/browser/spellchecker/spellcheck_profile.cc
+++ b/chrome/browser/spellchecker/spellcheck_profile.cc
@@ -6,6 +6,7 @@
 
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
+#include "base/logging.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ -13,7 +14,11 @@
 #include "chrome/browser/spellchecker/spellcheck_host.h"
 #include "chrome/browser/spellchecker/spellcheck_host_metrics.h"
 #include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
+#include "chrome/common/spellcheck_messages.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/render_process_host.h"
 
 using content::BrowserThread;
 
@@ -22,47 +27,45 @@ base::LazyInstance<SpellCheckProfile::CustomWordList> g_empty_list =
     LAZY_INSTANCE_INITIALIZER;
 }  // namespace
 
-SpellCheckProfile::SpellCheckProfile(const FilePath& profile_dir)
-    : host_ready_(false),
-      profile_dir_(profile_dir) {
+SpellCheckProfile::SpellCheckProfile(Profile* profile)
+    : profile_(profile),
+      host_ready_(false),
+      profile_dir_(profile->GetPath()) {
+  PrefService* prefs = profile_->GetPrefs();
+  pref_change_registrar_.Init(prefs);
+  pref_change_registrar_.Add(prefs::kSpellCheckDictionary, this);
+  pref_change_registrar_.Add(prefs::kEnableSpellCheck, this);
+  pref_change_registrar_.Add(prefs::kEnableAutoSpellCorrect, this);
 }
 
 SpellCheckProfile::~SpellCheckProfile() {
-  if (host_.get())
-    host_->UnsetProfile();
+  // Remove pref observers
+  pref_change_registrar_.RemoveAll();
 }
 
 SpellCheckHost* SpellCheckProfile::GetHost() {
   return host_ready_ ? host_.get() : NULL;
 }
 
-SpellCheckProfile::ReinitializeResult SpellCheckProfile::ReinitializeHost(
-    bool force,
-    bool enable,
-    const std::string& language,
-    net::URLRequestContextGetter* request_context) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) || IsTesting());
-  // If we are already loading the spellchecker, and this is just a hint to
-  // load the spellchecker, do nothing.
-  if (!force && host_.get())
-    return REINITIALIZE_DID_NOTHING;
-
-  host_ready_ = false;
-
-  bool host_deleted = false;
-  if (host_.get()) {
-    host_->UnsetProfile();
-    host_.reset(NULL);
-    host_deleted = true;
-  }
-
-  if (enable) {
-    // Retrieve the (perhaps updated recently) dictionary name from preferences.
-    host_.reset(CreateHost(this, language, request_context, metrics_.get()));
-    return REINITIALIZE_CREATED_HOST;
+void SpellCheckProfile::ReinitializeSpellCheckHost(bool force) {
+  PrefService* pref = profile_->GetPrefs();
+  SpellCheckProfile::ReinitializeResult result = ReinitializeHostImpl(
+      force,
+      pref->GetBoolean(prefs::kEnableSpellCheck),
+      pref->GetString(prefs::kSpellCheckDictionary),
+      profile_->GetRequestContext());
+  if (result == SpellCheckProfile::REINITIALIZE_REMOVED_HOST) {
+    // The spellchecker has been disabled.
+    for (content::RenderProcessHost::iterator i(
+            content::RenderProcessHost::AllHostsIterator());
+         !i.IsAtEnd(); i.Advance()) {
+      content::RenderProcessHost* process = i.GetCurrentValue();
+      process->Send(new SpellCheckMsg_Init(IPC::InvalidPlatformFileForTransit(),
+                                           std::vector<std::string>(),
+                                           std::string(),
+                                           false));
+    }
   }
-
-  return host_deleted ? REINITIALIZE_REMOVED_HOST : REINITIALIZE_DID_NOTHING;
 }
 
 SpellCheckHost* SpellCheckProfile::CreateHost(
@@ -139,6 +142,66 @@ void SpellCheckProfile::WriteWordToCustomDictionary(const std::string& word) {
   }
 }
 
+void SpellCheckProfile::Shutdown() {
+  if (host_.get())
+    host_->UnsetProfile();
+
+  profile_ = NULL;
+}
+
+void SpellCheckProfile::Observe(int type,
+                                const content::NotificationSource& source,
+                                const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_PREF_CHANGED: {
+      std::string* pref_name_in = content::Details<std::string>(details).ptr();
+      PrefService* prefs = content::Source<PrefService>(source).ptr();
+      DCHECK(pref_name_in && prefs);
+      if (*pref_name_in == prefs::kSpellCheckDictionary ||
+          *pref_name_in == prefs::kEnableSpellCheck) {
+        ReinitializeSpellCheckHost(true);
+      } else if (*pref_name_in == prefs::kEnableAutoSpellCorrect) {
+        bool enabled = prefs->GetBoolean(prefs::kEnableAutoSpellCorrect);
+        for (content::RenderProcessHost::iterator i(
+                content::RenderProcessHost::AllHostsIterator());
+             !i.IsAtEnd(); i.Advance()) {
+          content::RenderProcessHost* process = i.GetCurrentValue();
+          process->Send(new SpellCheckMsg_EnableAutoSpellCorrect(enabled));
+        }
+      }
+    }
+  }
+}
+
+SpellCheckProfile::ReinitializeResult SpellCheckProfile::ReinitializeHostImpl(
+    bool force,
+    bool enable,
+    const std::string& language,
+    net::URLRequestContextGetter* request_context) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) || IsTesting());
+  // If we are already loading the spellchecker, and this is just a hint to
+  // load the spellchecker, do nothing.
+  if (!force && host_.get())
+    return REINITIALIZE_DID_NOTHING;
+
+  host_ready_ = false;
+
+  bool host_deleted = false;
+  if (host_.get()) {
+    host_->UnsetProfile();
+    host_.reset(NULL);
+    host_deleted = true;
+  }
+
+  if (enable) {
+    // Retrieve the (perhaps updated recently) dictionary name from preferences.
+    host_.reset(CreateHost(this, language, request_context, metrics_.get()));
+    return REINITIALIZE_CREATED_HOST;
+  }
+
+  return host_deleted ? REINITIALIZE_REMOVED_HOST : REINITIALIZE_DID_NOTHING;
+}
+
 const FilePath& SpellCheckProfile::GetCustomDictionaryPath() {
   if (!custom_dictionary_path_.get()) {
     custom_dictionary_path_.reset(