Use internal hooks for notifying fullscreen changes to media controls

third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegateTest.cpp

Index: third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegateTest.cpp
diff --git a/third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegateTest.cpp b/third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegateTest.cpp
index 2acd74091dbe21efb507d1f6d0448df2bc5ce418..2358c1da8085a30627ed63c952c682285f7a2867 100644
--- a/third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegateTest.cpp
+++ b/third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegateTest.cpp
@@ -45,6 +45,14 @@ class MockVideoWebMediaPlayer : public EmptyWebMediaPlayer {
 
 class MockChromeClient : public EmptyChromeClient {
  public:
+  void fullscreenElementChanged(Element* fromElement,
+                                Element* toElement) override {
+    if (isHTMLVideoElement(toElement))
+      toHTMLVideoElement(toElement)->didEnterFullscreen();
+    if (isHTMLVideoElement(fromElement))
+      toHTMLVideoElement(fromElement)->didExitFullscreen();
+  }
+
   MOCK_CONST_METHOD0(screenInfo, WebScreenInfo());
 };