Chromecast on Android buildfix: don't try to create a RendererFactory.

The CMA code is not linked in for Android builds.

R=erickung@chromium.org
TBR=lcwu@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/821793002

Cr-Commit-Position: refs/heads/master@{#309492}

chromecast/renderer/cast_content_renderer_client.cc

@@ -73,6 +73,7 @@ void CastContentRendererClient::AddKeySystems(
   AddChromecastPlatformKeySystems(key_systems);
 }
 
+#if !defined(OS_ANDROID)
 scoped_ptr<::media::RendererFactory>
 CastContentRendererClient::CreateMediaRendererFactory(
     ::content::RenderFrame* render_frame) {
@@ -84,6 +85,7 @@ CastContentRendererClient::CreateMediaRendererFactory(
       new chromecast::media::CmaMediaRendererFactory(
           render_frame->GetRoutingID()));
 }
+#endif
 
 blink::WebPrescientNetworking*
 CastContentRendererClient::GetPrescientNetworking() {

chromecast/renderer/cast_content_renderer_client.h

@@ -27,8 +27,10 @@ class CastContentRendererClient : public content::ContentRendererClient {
   void RenderViewCreated(content::RenderView* render_view) override;
   void AddKeySystems(
       std::vector< ::media::KeySystemInfo>* key_systems) override;
+#if !defined(OS_ANDROID)
   scoped_ptr<media::RendererFactory> CreateMediaRendererFactory(
       content::RenderFrame* render_frame) override;
+#endif
   blink::WebPrescientNetworking* GetPrescientNetworking() override;
   void DeferMediaLoad(content::RenderFrame* render_frame,
                       const base::Closure& closure) override;