content/blimp: Set up hooks for enabling LTHRemote in the renderer.

content/public/renderer/content_renderer_client.cc

Index: content/public/renderer/content_renderer_client.cc
diff --git a/content/public/renderer/content_renderer_client.cc b/content/public/renderer/content_renderer_client.cc
index bb040a6bc891bc48cb7f605a17f59329d76a3a31..2a70221a30953a1a4d118671bdb3e67a4696f72e 100644
--- a/content/public/renderer/content_renderer_client.cc
+++ b/content/public/renderer/content_renderer_client.cc
@@ -4,6 +4,7 @@
 
 #include "content/public/renderer/content_renderer_client.h"
 
+#include "cc/blimp/remote_compositor_bridge.h"
 #include "content/public/renderer/media_stream_renderer_factory.h"
 #include "media/base/renderer_factory.h"
 #include "third_party/WebKit/public/platform/modules/app_banner/WebAppBannerClient.h"
@@ -184,6 +185,13 @@ ContentRendererClient::GetImageSerializationProcessor() {
   return nullptr;
 }
 
+std::unique_ptr<cc::RemoteCompositorBridge>
+ContentRendererClient::CreateRemoteCompositorBridge(
+    cc::RemoteProtoChannel* remote_proto_channel,
+    scoped_refptr<base::SingleThreadTaskRunner> compositor_main_task_runner) {
+  return nullptr;
+}
+
 std::unique_ptr<gfx::ICCProfile>
 ContentRendererClient::GetImageDecodeColorProfile() {
   return nullptr;