Adding UMA on page load size for pages with Media

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 a3a195c2fcc3b2a7ca372c8415f8bea99985f949..7acb0d5b19c72ff20aeaada1d1a9d85ac1a98562 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
@@ -26,6 +26,7 @@
 
 #include "core/html/HTMLMediaElement.h"
 
+#include <limits>

[RyanSturm, 2017/03/07 23:49:28]

git cl format keeps moving this header like this. Let me know if I should leave
it at the bottom of the list (I'm not sure what blink style says).

[Charlie Harrison, 2017/03/08 14:33:58]

Personally I am happy doing whatever git cl format thinks is right. At least
that's what I've been doing in Blink.

 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/Microtask.h"
 #include "bindings/core/v8/ScriptController.h"
@@ -68,6 +69,7 @@
 #include "core/layout/LayoutMedia.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/layout/compositing/PaintLayerCompositor.h"
+#include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/ChromeClient.h"
@@ -87,6 +89,7 @@
 #include "public/platform/WebAudioSourceProvider.h"
 #include "public/platform/WebContentDecryptionModule.h"
 #include "public/platform/WebInbandTextTrack.h"
+#include "public/platform/WebLoadingBehaviorFlag.h"
 #include "public/platform/WebMediaPlayerSource.h"
 #include "public/platform/WebMediaStream.h"
 #include "public/platform/modules/remoteplayback/WebRemotePlaybackAvailability.h"
@@ -97,7 +100,6 @@
 #include "wtf/MathExtras.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/text/CString.h"
-#include <limits>
 
 #ifndef BLINK_MEDIA_LOG
 #define BLINK_MEDIA_LOG DVLOG(3)
@@ -2317,6 +2319,9 @@ void HTMLMediaElement::playInternal() {
     scheduleResolvePlayPromises();
   }
 
+  document().loader()->didObserveLoadingBehavior(
+      WebLoadingBehaviorFlag::WebLoadingBehaviorMediaPlayed);
+
   m_canAutoplay = false;
 
   setIgnorePreloadNone();