Added "Exit full screen" to context menu.

chrome/browser/renderer_context_menu/render_view_context_menu.h

Index: chrome/browser/renderer_context_menu/render_view_context_menu.h
diff --git a/chrome/browser/renderer_context_menu/render_view_context_menu.h b/chrome/browser/renderer_context_menu/render_view_context_menu.h
index 62a0f7443d616fb8a2b3689d71a593897de2b348..c4c63cb4d7df2b48421ac914e75fc46bdd7e5978 100644
--- a/chrome/browser/renderer_context_menu/render_view_context_menu.h
+++ b/chrome/browser/renderer_context_menu/render_view_context_menu.h
@@ -92,6 +92,10 @@ class RenderViewContextMenu : public RenderViewContextMenuBase {
 #endif
   void RecordUsedItem(int id) override;
 
+  // Returns true if the browser is in HTML fullscreen mode, initiated by the
+  // page (as opposed to the user). Used to determine which shortcut to display.
+  bool IsHTML5Fullscreen() const;
+
  private:
   friend class RenderViewContextMenuTest;
   friend class TestRenderViewContextMenu;
@@ -131,6 +135,7 @@ class RenderViewContextMenu : public RenderViewContextMenuBase {
   void AppendMediaItems();
   void AppendPluginItems();
   void AppendPageItems();
+  void AppendExitFullscreenItem();
   void AppendCopyItem();
   void AppendPrintItem();
   void AppendMediaRouterItem();
@@ -169,6 +174,7 @@ class RenderViewContextMenu : public RenderViewContextMenuBase {
   void ExecInspectBackgroundPage();
   void ExecSaveLinkAs();
   void ExecSaveAs();
+  void ExecExitFullscreen();
   void ExecCopyLinkText();
   void ExecCopyImageAt();
   void ExecSearchWebForImage();