Convert FullscreenController to use WebCallbacks

third_party/WebKit/Source/web/FullscreenController.h

Index: third_party/WebKit/Source/web/FullscreenController.h
diff --git a/third_party/WebKit/Source/web/FullscreenController.h b/third_party/WebKit/Source/web/FullscreenController.h
index 4ffbd6d406d4289e23579dd682ef6928a26af2d0..e893dab27357ae2394292e2270c7407b6cd90ed7 100644
--- a/third_party/WebKit/Source/web/FullscreenController.h
+++ b/third_party/WebKit/Source/web/FullscreenController.h
@@ -33,11 +33,13 @@
 
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntSize.h"
+#include "wtf/Vector.h"
 #include <memory>
 
 namespace blink {
 
 class Element;
+class FullscreenCallbacks;
 class LocalFrame;
 class WebViewImpl;
 
@@ -47,7 +49,7 @@ class FullscreenController {
 
   // Called by Fullscreen (via ChromeClient) to request entering or exiting
   // fullscreen.
-  void enterFullscreen(LocalFrame&);
+  void enterFullscreen(LocalFrame&, std::unique_ptr<FullscreenCallbacks>);
   void exitFullscreen(LocalFrame&);
 
   // Called by content::RenderWidget (via WebWidget) to notify that we've
@@ -94,6 +96,9 @@ class FullscreenController {
   float m_initialPageScaleFactor = 0.0f;
   IntSize m_initialScrollOffset;
   FloatPoint m_initialVisualViewportOffset;
+
+  using CallbacksList = Vector<std::unique_ptr<FullscreenCallbacks>>;
+  CallbacksList m_callbacksList;
 };
 
 }  // namespace blink