Fullscreen JS API implementation.

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index b4c98c9173edebbce7419eb1e347c97530873d0b..ef740550399ce87edd7aabc94d6fc416910a0a7e 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -880,6 +880,8 @@ class Browser : public TabHandlerDelegate,
   virtual void DidNavigateToPendingEntry(TabContents* tab) OVERRIDE;
   virtual content::JavaScriptDialogCreator*
   GetJavaScriptDialogCreator() OVERRIDE;
+  virtual void ToggleFullscreenModeForTab(TabContents* tab,
+      bool enter_fullscreen) OVERRIDE;
 
   // Overridden from TabContentsWrapperDelegate:
   virtual void OnDidGetApplicationInfo(TabContentsWrapper* source,
@@ -1006,6 +1008,25 @@ class Browser : public TabHandlerDelegate,
   // >= index.
   void SyncHistoryWithTabs(int index);
 
+  // Tab fullscreen functions /////////////////////////////////////////////////
+
+  // There are two different kinds of fullscreen mode - "tab fullscreen" and
+  // "browser fullscreen". "Tab fullscreen" refers to when a tab enters
+  // fullscreen mode via the JS fullscreen API, and "browser fullscreen"
+  // refers to the user putting the browser itself into fullscreen mode from
+  // the UI. The difference is that tab fullscreen has implications for how
+  // the contents of the tab render (eg: a video element may grow to consume
+  // the whole tab), whereas browser fullscreen mode doesn't. Therefore if a
+  // user forces an exit from fullscreen, we need to notify the tab so it can
+  // stop rendering in its fullscreen mode.
+
+  // Make the current tab exit fullscreen mode if it is in it.
+  void ExitTabbedFullscreenModeIfNecessary();
+
+  // Notifies the tab that it has been forced out of fullscreen mode if
+  // necessary.
+  void NotifyTabOfFullscreenExitIfNecessary();
+
   // OnBeforeUnload handling //////////////////////////////////////////////////
 
   typedef std::set<TabContents*> UnloadListenerSet;
@@ -1126,6 +1147,7 @@ class Browser : public TabHandlerDelegate,
   // BrowserWindow if necessary.
   void UpdateBookmarkBarState(BookmarkBarStateChangeReason reason);
 
+
   // Data members /////////////////////////////////////////////////////////////
 
   NotificationRegistrar registrar_;
@@ -1265,6 +1287,12 @@ class Browser : public TabHandlerDelegate,
 
   BookmarkBar::State bookmark_bar_state_;
 
+  // Tab to notify when the browser exits fullscreen mode.
+  TabContentsWrapper* fullscreened_tab_;
+
+  // True if the current tab is in fullscreen mode.
+  bool tab_caused_fullscreen_;
+
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };