Convert FullscreenController to use WebCallbacks

third_party/WebKit/Source/core/page/ChromeClient.h

Index: third_party/WebKit/Source/core/page/ChromeClient.h
diff --git a/third_party/WebKit/Source/core/page/ChromeClient.h b/third_party/WebKit/Source/core/page/ChromeClient.h
index 37012a67f2be6536f6cfe2b38276282c2684670a..affde04679e2a5c889df947f516c7923ade89370 100644
--- a/third_party/WebKit/Source/core/page/ChromeClient.h
+++ b/third_party/WebKit/Source/core/page/ChromeClient.h
@@ -57,6 +57,7 @@ class Element;
 class FileChooser;
 class FloatPoint;
 class Frame;
+class FullscreenCallbacks;
 class GraphicsLayer;
 class HTMLFormControlElement;
 class HTMLInputElement;
@@ -245,7 +246,8 @@ class CORE_EXPORT ChromeClient : public HostWindow {
   virtual void detachCompositorAnimationTimeline(CompositorAnimationTimeline*,
                                                  LocalFrame* localRoot) {}
 
-  virtual void enterFullscreen(LocalFrame&) {}
+  virtual void enterFullscreen(LocalFrame&,
+                               std::unique_ptr<FullscreenCallbacks>) {}
   virtual void exitFullscreen(LocalFrame&) {}
   virtual void fullscreenElementChanged(Element*, Element*) {}