media: Remove CreateMediaRendererFactory()

Now ChromeCast has switched to use mojo Renderer, nobody is using this
path any more.

BUG=571155
TEST=No functionality change

Review-Url: https://codereview.chromium.org/2325733002
Cr-Commit-Position: refs/heads/master@{#417515}

content/public/renderer/content_renderer_client.cc

@@ -168,14 +168,6 @@ bool ContentRendererClient::AllowPepperMediaStreamAPI(const GURL& url) {
 void ContentRendererClient::AddSupportedKeySystems(
     std::vector<std::unique_ptr<media::KeySystemProperties>>* key_systems) {}
 
-std::unique_ptr<media::RendererFactory>
-ContentRendererClient::CreateMediaRendererFactory(
-    RenderFrame* render_frame,
-    media::GpuVideoAcceleratorFactories* gpu_factories,
-    const scoped_refptr<media::MediaLog>& media_log) {
-  return nullptr;
-}
-
 std::unique_ptr<MediaStreamRendererFactory>
 ContentRendererClient::CreateMediaStreamRendererFactory() {
   return nullptr;

content/public/renderer/content_renderer_client.h

@@ -264,12 +264,6 @@ class CONTENT_EXPORT ContentRendererClient {
   // Returns true if the page at |url| can use Pepper MediaStream APIs.
   virtual bool AllowPepperMediaStreamAPI(const GURL& url);
 
-  // Allows an embedder to provide a media::RendererFactory.
-  virtual std::unique_ptr<media::RendererFactory> CreateMediaRendererFactory(
-      RenderFrame* render_frame,
-      media::GpuVideoAcceleratorFactories* gpu_factories,
-      const scoped_refptr<media::MediaLog>& media_log);
-
   // Allows an embedder to provide a MediaStreamRendererFactory.
   virtual std::unique_ptr<MediaStreamRendererFactory>
   CreateMediaStreamRendererFactory();

content/renderer/render_frame_impl.cc

@@ -2633,16 +2633,11 @@ blink::WebMediaPlayer* RenderFrameImpl::createMediaPlayer(
                      base::Unretained(render_thread)),
           GetMediaInterfaceProvider()));
 #else
-  std::unique_ptr<media::RendererFactory> media_renderer_factory =
-      GetContentClient()->renderer()->CreateMediaRendererFactory(
-          this, render_thread->GetGpuFactories(), media_log);
-
-  if (!media_renderer_factory.get()) {
-    media_renderer_factory.reset(new media::DefaultRendererFactory(
-        media_log, GetDecoderFactory(),
-        base::Bind(&RenderThreadImpl::GetGpuFactories,
-                   base::Unretained(render_thread))));
-  }
+  std::unique_ptr<media::RendererFactory> media_renderer_factory(
+      new media::DefaultRendererFactory(
+          media_log, GetDecoderFactory(),
+          base::Bind(&RenderThreadImpl::GetGpuFactories,
+                     base::Unretained(render_thread))));
 #endif  // defined(ENABLE_MOJO_RENDERER)
 
   if (!url_index_.get() || url_index_->frame() != frame_)