Incorporate BlobChannel into Blimp image encode/decode pipeline.

blimp/engine/renderer/blimp_content_renderer_client.cc

Index: blimp/engine/renderer/blimp_content_renderer_client.cc
diff --git a/blimp/engine/renderer/blimp_content_renderer_client.cc b/blimp/engine/renderer/blimp_content_renderer_client.cc
index c1470eae9b6b8940155f723bf8fb80ba82e09718..dc60f1d3a04b4b60f5778ce2f1c0be2ce33c717a 100644
--- a/blimp/engine/renderer/blimp_content_renderer_client.cc
+++ b/blimp/engine/renderer/blimp_content_renderer_client.cc
@@ -4,25 +4,14 @@
 
 #include "blimp/engine/renderer/blimp_content_renderer_client.h"
 
+#include "base/memory/ptr_util.h"
 #include "blimp/engine/mojo/blob_channel.mojom.h"
+#include "blimp/engine/renderer/blob_channel_sender_proxy.h"
 #include "blimp/engine/renderer/engine_image_serialization_processor.h"
 #include "components/web_cache/renderer/web_cache_impl.h"
-#include "content/public/common/service_registry.h"
-#include "content/public/renderer/render_thread.h"
 
 namespace blimp {
 namespace engine {
-namespace {
-
-mojom::BlobChannelPtr GetConnectedBlobChannel() {
-  mojom::BlobChannelPtr blob_channel_ptr;
-  content::RenderThread::Get()->GetServiceRegistry()->ConnectToRemoteService(
-      mojo::GetProxy(&blob_channel_ptr));
-  DCHECK(blob_channel_ptr);
-  return blob_channel_ptr;
-}
-
-}  // namespace
 
 BlimpContentRendererClient::BlimpContentRendererClient() {}
 
@@ -30,8 +19,8 @@ BlimpContentRendererClient::~BlimpContentRendererClient() {}
 
 void BlimpContentRendererClient::RenderThreadStarted() {
   web_cache_impl_.reset(new web_cache::WebCacheImpl());
-  image_serialization_processor_.reset(
-      new EngineImageSerializationProcessor(GetConnectedBlobChannel()));
+  image_serialization_processor_.reset(new EngineImageSerializationProcessor(
+      base::WrapUnique(new BlobChannelSenderProxy)));
 }
 
 cc::ImageSerializationProcessor*