Extract Peer interface out of ResourceLoaderBridge.

content/child/web_url_loader_impl.cc

Index: content/child/web_url_loader_impl.cc
diff --git a/content/child/web_url_loader_impl.cc b/content/child/web_url_loader_impl.cc
index 13300df12f66c0c64a65777dfb8daf0add7ebc43..00bbf1b1e61598ff987a349e5a580198774c28b6 100644
--- a/content/child/web_url_loader_impl.cc
+++ b/content/child/web_url_loader_impl.cc
@@ -18,6 +18,7 @@
 #include "content/child/request_info.h"
 #include "content/child/sync_load_response.h"
 #include "content/common/resource_request_body.h"
+#include "content/public/child/request_peer.h"
 #include "net/base/data_url.h"
 #include "net/base/load_flags.h"
 #include "net/base/mime_util.h"
@@ -221,7 +222,7 @@ net::RequestPriority ConvertWebKitPriorityToNetPriority(
 // call to WebURLLoaderClient.  The bridge requires its Peer to stay alive
 // until it receives OnCompletedRequest.
 class WebURLLoaderImpl::Context : public base::RefCounted<Context>,
-                                  public ResourceLoaderBridge::Peer {
+                                  public RequestPeer {
  public:
   explicit Context(WebURLLoaderImpl* loader);
 
@@ -234,7 +235,7 @@ class WebURLLoaderImpl::Context : public base::RefCounted<Context>,
   void Start(const WebURLRequest& request,
              SyncLoadResponse* sync_load_response);
 
-  // ResourceLoaderBridge::Peer methods:
+  // RequestPeer methods:
   virtual void OnUploadProgress(uint64 position, uint64 size) OVERRIDE;
   virtual bool OnReceivedRedirect(
       const GURL& new_url,