Refactor overlay fullscreen video handling into a single callback

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
index 26c96f482d36418c0f2e33185ac42c97bb136068..98a964c321f39f8c59fbb02c48e4011ee15cf46c 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
@@ -1194,10 +1194,8 @@ void HTMLMediaElement::startPlayerLoad(const KURL& playerProvidedUrl) {
 
   m_webMediaPlayer->load(loadType(), source, corsMode());
 
-  if (isFullscreen()) {
-    // This handles any transition to or from fullscreen overlay mode.
-    frame->chromeClient().enterFullscreenForElement(this);
-  }
+  if (isFullscreen())
+    m_webMediaPlayer->enteredFullscreen();
 }
 
 void HTMLMediaElement::setPlayerPreload() {
@@ -3500,7 +3498,7 @@ void HTMLMediaElement::exitFullscreen() {
   Fullscreen::exitFullscreen(document());
 }
 
-void HTMLMediaElement::didBecomeFullscreenElement() {
+void HTMLMediaElement::didEnterFullscreen() {
   if (mediaControls())
     mediaControls()->enteredFullscreen();
   // FIXME: There is no embedder-side handling in layout test mode.
@@ -3513,7 +3511,7 @@ void HTMLMediaElement::didBecomeFullscreenElement() {
         CompositingUpdateRebuildTree);
 }
 
-void HTMLMediaElement::willStopBeingFullscreenElement() {
+void HTMLMediaElement::didExitFullscreen() {
   if (mediaControls())
     mediaControls()->exitedFullscreen();
   if (webMediaPlayer())