Move media::mojom::RemoterFactory to content, add ContentBrowserClient API.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index d69468a0c9ae77c6eb3a088c5c851fb1cd6ad704..d42fd2215c17da4c3f807c683efb9bfb763a4c9c 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -26,6 +26,7 @@
 #include "content/public/common/socket_permission_request.h"
 #include "content/public/common/window_container_type.h"
 #include "media/audio/audio_manager.h"
+#include "media/mojo/interfaces/remoting.mojom.h"
 #include "net/base/mime_util.h"
 #include "net/cookies/canonical_cookie.h"
 #include "storage/browser/fileapi/file_system_context.h"
@@ -773,6 +774,14 @@ class CONTENT_EXPORT ContentBrowserClient {
   // Returns an instance of MemoryCoordinatorDelegate.
   virtual std::unique_ptr<MemoryCoordinatorDelegate>
   GetMemoryCoordinatorDelegate();
+
+  // Binds a new media remoter service to |request|, if supported by the
+  // embedder, for the |source| that lives in the render frame represented
+  // by |render_frame_host|. This may be called multiple times if there is more
+  // than one source candidate in the same render frame.
+  virtual void CreateMediaRemoter(RenderFrameHost* render_frame_host,
+                                  media::mojom::RemotingSourcePtr source,
+                                  media::mojom::RemoterRequest request) {}
 };
 
 }  // namespace content