Added support in Metro mode for retrieving the information about the currently

chrome/browser/ui/views/frame/browser_frame_win.cc

Index: chrome/browser/ui/views/frame/browser_frame_win.cc
===================================================================
--- chrome/browser/ui/views/frame/browser_frame_win.cc	(revision 134602)
+++ chrome/browser/ui/views/frame/browser_frame_win.cc	(working copy)
@@ -10,6 +10,8 @@
 #include <set>
 
 #include "base/command_line.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 #include "base/win/metro.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/search_engines/template_url.h"
@@ -24,7 +26,9 @@
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/page_navigator.h"
+#include "content/public/browser/web_contents.h"
 #include "content/public/common/page_transition_types.h"
+#include "googleurl/src/gurl.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/models/simple_menu_model.h"
@@ -50,7 +54,21 @@
 
 using content::OpenURLParams;
 using content::Referrer;
+using content::WebContents;
 
+namespace {
+
+void LocalAllocAndCopyString(const wchar_t* src, wchar_t** dest) {
+  DCHECK(src);
+  DCHECK(dest);
+
+  size_t dest_size = (wcslen(src) + 1) * sizeof(wchar_t);
+  *dest = reinterpret_cast<wchar_t*>(LocalAlloc(LPTR, dest_size));
+  base::wcslcpy(*dest, src, dest_size);
+}
+
+}  // namespace
+
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserFrameWin, public:
 
@@ -208,9 +226,15 @@
                                    LPARAM l_param) {
   static const UINT metro_navigation_search_message =
       RegisterWindowMessage(chrome::kMetroNavigationAndSearchMessage);
-  if (message == metro_navigation_search_message)
-    HandleMetroRequest(w_param, l_param);
 
+  static const UINT metro_get_current_tab_info_message =
+      RegisterWindowMessage(chrome::kMetroGetCurrentTabInfoMessage);
+
+  if (message == metro_navigation_search_message) {
+    HandleMetroNavSearchRequest(w_param, l_param);
+  } else if (message == metro_get_current_tab_info_message) {
+    GetMetroCurrentTabInfo(w_param);
+  }
   return views::NativeWidgetWin::OnWndProc(message, w_param, l_param);
 }
 
@@ -307,7 +331,8 @@
   }
 }
 
-void BrowserFrameWin::HandleMetroRequest(WPARAM w_param, LPARAM l_param) {
+void BrowserFrameWin::HandleMetroNavSearchRequest(WPARAM w_param,
+                                                  LPARAM l_param) {
   if (!base::win::GetMetroModule()) {
     NOTREACHED() << "Received unexpected metro navigation request";
     return;
@@ -346,7 +371,36 @@
   }
 }
 
+void BrowserFrameWin::GetMetroCurrentTabInfo(WPARAM w_param) {
+  if (!base::win::GetMetroModule()) {
+    NOTREACHED() << "Received unexpected metro request";
+    return;
+  }
 
+  if (!w_param) {
+    NOTREACHED() << "Invalid metro request parameter";
+    return;
+  }
+
+  base::win::CurrentTabInfo* current_tab_info =
+      reinterpret_cast<base::win::CurrentTabInfo*>(w_param);
+
+  Browser* browser = browser_view()->browser();
+  DCHECK(browser);
+
+  // We allocate memory for the title and url via LocalAlloc. The caller has to
+  // free the memory via LocalFree.
+  LocalAllocAndCopyString(browser->GetWindowTitleForCurrentTab().c_str(),
+                          &current_tab_info->title);
+
+  WebContents* current_tab = browser->GetSelectedWebContents();
+  DCHECK(current_tab);
+
+  LocalAllocAndCopyString(UTF8ToWide(current_tab->GetURL().spec()).c_str(),
+                          &current_tab_info->url);
+}
+
+
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserFrame, public: