media: Set MediaClientAndroid in the GPU process.

content/public/common/content_client.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 16 matching lines @@
 }
 
 namespace gfx {
 class Image;
 }
 
 namespace gpu {
 struct GPUInfo;
 }
 
+namespace media {
+class MediaClientAndroid;
+}
+
 namespace sandbox {
 class TargetPolicy;
 }
 
 namespace content {
 
 class ContentBrowserClient;
 class ContentClient;
 class ContentGpuClient;
 class ContentRendererClient;
@@ skipping 109 matching lines @@
 
   // Returns the public key to be used for origin trials, or an empty string if
   // origin trials are not enabled in this context.
   virtual base::StringPiece GetOriginTrialPublicKey();
 
 #if defined(OS_ANDROID)
   // Returns true for clients like Android WebView that uses synchronous
   // compositor. Note setting this to true will permit synchronous IPCs from
   // the browser UI thread.
   virtual bool UsingSynchronousCompositing();
+
+  // Returns the MediaClientAndroid to be used by media code on Android.
+  virtual media::MediaClientAndroid* GetMediaClientAndroid();

[Lei Zhang, 2016/04/26 00:02:21]

Can this go into ContentGpuClient instead?

[xhwang, 2016/04/26 03:25:45]

Good question. Please see the CL description:

"Today in the browser, we call media::SetMediaClientAndroid() directly
from content embedders (e.g. ChromeBrowserMainPartsAndroid), which
seems hacky. We should use ContentClient::GetMediaClientAndroid() in
the browser process as well so that content will talk to the embedder,
and then talk to media. I'll work on it after this CL."

So this code will be called in both the browser process and gpu process.
Actually, in M53-ish we'll deprecate the browser part, at that point I should
be able to move this code to the GpuClient. Do you want me to do that
now and keep the browser code as is?

 #endif  // OS_ANDROID
 
  private:
   friend class ContentClientInitializer;  // To set these pointers.
   friend class InternalTestInitializer;
 
   // The embedder API for participating in browser logic.
   ContentBrowserClient* browser_;
   // The embedder API for participating in gpu logic.
   ContentGpuClient* gpu_;
   // The embedder API for participating in renderer logic.
   ContentRendererClient* renderer_;
   // The embedder API for participating in utility logic.
   ContentUtilityClient* utility_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_