Connect WebMediaPlayerImpl to WebContentDecryptionModuleImpl for EME WD (Chromium side)

content/renderer/media/webmediaplayer_impl.h

Index: content/renderer/media/webmediaplayer_impl.h
diff --git a/content/renderer/media/webmediaplayer_impl.h b/content/renderer/media/webmediaplayer_impl.h
index 50ee39b14291eec5ec4097a7a84626d53098a756..099cd752430bec47b4e83912bc42687780f3f831 100644
--- a/content/renderer/media/webmediaplayer_impl.h
+++ b/content/renderer/media/webmediaplayer_impl.h
@@ -47,6 +47,7 @@
 class RenderAudioSourceProvider;
 
 namespace blink {
+class WebContentDecryptionModule;
 class WebFrame;
 }
 
@@ -175,6 +176,8 @@ class WebMediaPlayerImpl
       const blink::WebString& key_system,
       const blink::WebString& session_id);
 
+  virtual void mediaKeysChanged(blink::WebContentDecryptionModule* cdm);
+
   // content::RenderViewObserver implementation.
   virtual void OnDestruct() OVERRIDE;
 
@@ -373,6 +376,10 @@ class WebMediaPlayerImpl
   // Text track objects get a unique index value when they're created.
   int text_track_index_;
 
+  // Non-owned pointer to the CDM. Determined at initialization, but can be
+  // updated via calls to mediaKeysChanged().
+  blink::WebContentDecryptionModule* cdm_;
+
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };