<webview>: Implement fullscreen permission for html5 element.requestFullscreen()

extensions/browser/guest_view/web_view/web_view_guest.h

Index: extensions/browser/guest_view/web_view/web_view_guest.h
diff --git a/extensions/browser/guest_view/web_view/web_view_guest.h b/extensions/browser/guest_view/web_view/web_view_guest.h
index cb190d9230b27414932897b33d77a9821599d5b6..c3d897c4c810db9e68e612bca5de36be58890404 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest.h
+++ b/extensions/browser/guest_view/web_view/web_view_guest.h
@@ -91,6 +91,7 @@ class WebViewGuest : public GuestView<WebViewGuest>,
                            std::string* error);
 
   // GuestViewBase implementation.
+  void EmbedderFullscreenToggled(bool entered_fullscreen) override;
   bool CanRunInDetachedState() const override;
   void CreateWebContents(const base::DictionaryValue& create_params,
                          const WebContentsCreatedCallback& callback) override;
@@ -164,6 +165,11 @@ class WebViewGuest : public GuestView<WebViewGuest>,
                           const base::string16& frame_name,
                           const GURL& target_url,
                           content::WebContents* new_contents) override;
+  void EnterFullscreenModeForTab(content::WebContents* web_contents,
+                                 const GURL& origin) override;
+  void ExitFullscreenModeForTab(content::WebContents* web_contents) override;
+  bool IsFullscreenForTabOrPending(
+      const content::WebContents* web_contents) const override;
 
   // NotificationObserver implementation.
   void Observe(int type,
@@ -320,6 +326,10 @@ class WebViewGuest : public GuestView<WebViewGuest>,
 
   void ApplyAttributes(const base::DictionaryValue& params);
 
+  void OnFullscreenPermissionDecided(const GURL& origin,
+                                     bool allowed,
+                                     const std::string& user_input);
+
   // Identifies the set of rules registries belonging to this guest.
   int rules_registry_id_;
 
@@ -371,6 +381,7 @@ class WebViewGuest : public GuestView<WebViewGuest>,
 
   // Determines if this guest accepts pinch-zoom gestures.
   bool allow_scaling_;
+  bool is_fullscreen_;
 
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.