[content shell] add support for entering/exiting fullscreen mode for layout test

content/shell/shell.h

Index: content/shell/shell.h
diff --git a/content/shell/shell.h b/content/shell/shell.h
index f22e03adc3f94e38701e23e8f3f9a9a575dd8070..6934c97261e97b489c4360900fad6a8f332c05cf 100644
--- a/content/shell/shell.h
+++ b/content/shell/shell.h
@@ -104,11 +104,11 @@ class Shell : public WebContentsDelegate,
 #if defined(OS_ANDROID)
   virtual void LoadProgressChanged(WebContents* source,
                                    double progress) OVERRIDE;
-  virtual void ToggleFullscreenModeForTab(content::WebContents* web_contents,
+#endif
+  virtual void ToggleFullscreenModeForTab(WebContents* web_contents,
                                           bool enter_fullscreen) OVERRIDE;
   virtual bool IsFullscreenForTabOrPending(
-      const content::WebContents* web_contents) const OVERRIDE;
-#endif
+      const WebContents* web_contents) const OVERRIDE;
   virtual void CloseContents(WebContents* source) OVERRIDE;
   virtual bool CanOverscrollContent() const OVERRIDE;
   virtual void WebContentsCreated(WebContents* source_contents,
@@ -160,6 +160,12 @@ class Shell : public WebContentsDelegate,
   void PlatformSetIsLoading(bool loading);
   // Set the title of shell window
   void PlatformSetTitle(const string16& title);
+#if defined(OS_ANDROID)
+  void PlatformToggleFullscreenModeForTab(WebContents* web_contents,
+                                          bool enter_fullscreen);
+  bool PlatformIsFullscreenForTabOrPending(
+      const WebContents* web_contents) const;
+#endif
 
 #if (defined(OS_WIN) && !defined(USE_AURA)) || defined(TOOLKIT_GTK)
   // Resizes the main window to the given dimensions.
@@ -197,6 +203,8 @@ class Shell : public WebContentsDelegate,
 
   scoped_ptr<WebContents> web_contents_;
 
+  bool is_fullscreen_;
+
   gfx::NativeWindow window_;
   gfx::NativeEditView url_edit_view_;