Add a ResourceScheduler to ResourceDispatcherHost.

content/common/resource_dispatcher.cc

Index: content/common/resource_dispatcher.cc
diff --git a/content/common/resource_dispatcher.cc b/content/common/resource_dispatcher.cc
index ce49f4e133b1f5fe7803db278b160627de6edd27..45109670f2339fa3c2f9493154ab36d68403d6a8 100644
--- a/content/common/resource_dispatcher.cc
+++ b/content/common/resource_dispatcher.cc
@@ -22,6 +22,7 @@
 #include "content/public/common/resource_response.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_response_headers.h"
 #include "webkit/glue/resource_request_body.h"
 #include "webkit/glue/resource_type.h"
@@ -62,6 +63,7 @@ class IPCResourceLoaderBridge : public ResourceLoaderBridge {
   virtual bool Start(Peer* peer) OVERRIDE;
   virtual void Cancel() OVERRIDE;
   virtual void SetDefersLoading(bool value) OVERRIDE;
+  virtual void DidChangePriority(net::RequestPriority new_priority) OVERRIDE;
   virtual void SyncLoad(SyncLoadResponse* response) OVERRIDE;
 
  private:
@@ -193,6 +195,16 @@ void IPCResourceLoaderBridge::SetDefersLoading(bool value) {
   dispatcher_->SetDefersLoading(request_id_, value);
 }
 
+void IPCResourceLoaderBridge::DidChangePriority(
+    net::RequestPriority new_priority) {
+  if (request_id_ < 0) {
+    NOTREACHED() << "Trying to change priority of an unstarted request";
+    return;
+  }
+
+  dispatcher_->DidChangePriority(routing_id_, request_id_, new_priority);
+}
+
 void IPCResourceLoaderBridge::SyncLoad(SyncLoadResponse* response) {
   if (request_id_ != -1) {
     NOTREACHED() << "Starting a request twice";
@@ -549,6 +561,13 @@ void ResourceDispatcher::SetDefersLoading(int request_id, bool value) {
   }
 }
 
+void ResourceDispatcher::DidChangePriority(
+    int routing_id, int request_id, net::RequestPriority new_priority) {
+  DCHECK(ContainsKey(pending_requests_, request_id));
+  message_sender()->Send(new ResourceHostMsg_DidChangePriority(
+      routing_id, request_id, new_priority));
+}
+
 ResourceDispatcher::PendingRequestInfo::PendingRequestInfo()
     : peer(NULL),
       resource_type(ResourceType::SUB_RESOURCE),