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 30a8d87febb6ef434f8ec50121e94fa1352bc719..eca912d68b9a97d76a43045f8294b6a352895f7f 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -790,6 +790,7 @@ class Browser : public TabHandlerDelegate,
   FRIEND_TEST_ALL_PREFIXES(BrowserTest, ConvertTabToAppShortcut);
   FRIEND_TEST_ALL_PREFIXES(BrowserTest, OpenAppWindowLikeNtp);
   FRIEND_TEST_ALL_PREFIXES(BrowserTest, AppIdSwitch);
+  FRIEND_TEST_ALL_PREFIXES(BrowserTest, TestToggleFullscreenModeForTab);
   FRIEND_TEST_ALL_PREFIXES(BrowserInitTest, OpenAppShortcutNoPref);
   FRIEND_TEST_ALL_PREFIXES(BrowserInitTest, OpenAppShortcutWindowPref);
   FRIEND_TEST_ALL_PREFIXES(BrowserInitTest, OpenAppShortcutTabPref);
@@ -895,6 +896,8 @@ 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,
@@ -1024,6 +1027,25 @@ 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;
@@ -1147,6 +1169,14 @@ class Browser : public TabHandlerDelegate,
   // Open the bookmark manager with a defined hash action.
   void OpenBookmarkManagerWithHash(const std::string& action, int64 node_id);
 
+  // Make the current tab exit fullscreen mode. If the browser was fullscreen
+  // because of that (as opposed to the user clicking the fullscreen button)
+  // then take the browser out of fullscreen mode as well.
+  void ExitTabbedFullscreenMode();
+
+  // Notifies the tab that it has been forced out of fullscreen mode.
+  void NotifyTabOfFullscreenExit();
+
   // Data members /////////////////////////////////////////////////////////////
 
   NotificationRegistrar registrar_;
@@ -1289,6 +1319,12 @@ 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);
 };