Introduce ResourceRequesterInfo to abstract the requester of resource request

content/browser/loader/async_resource_handler.cc

Index: content/browser/loader/async_resource_handler.cc
diff --git a/content/browser/loader/async_resource_handler.cc b/content/browser/loader/async_resource_handler.cc
index 2c5badcd5e11c2ca7f1a71ae40b66e60ddf8f82b..9ef64b7ab1af1b5d6e04201d7a85c985eafb1182 100644
--- a/content/browser/loader/async_resource_handler.cc
+++ b/content/browser/loader/async_resource_handler.cc
@@ -260,6 +260,7 @@ void AsyncResourceHandler::OnUploadProgressACK(int request_id) {
 
 void AsyncResourceHandler::ReportUploadProgress() {
   DCHECK(GetRequestInfo()->is_upload_progress_enabled());
+  DCHECK(GetRequestInfo()->requester_info().IsRenderer());
   if (waiting_for_upload_progress_ack_)
     return;  // Send one progress event at a time.
 
@@ -282,7 +283,7 @@ void AsyncResourceHandler::ReportUploadProgress() {
   bool too_much_time_passed = time_since_last > kOneSecond;
 
   if (is_finished || enough_new_progress || too_much_time_passed) {
-    ResourceMessageFilter* filter = GetFilter();
+    BrowserMessageFilter* filter = GetFilter();
     if (filter) {
       filter->Send(
         new ResourceMsg_UploadProgress(GetRequestID(),
@@ -299,8 +300,9 @@ bool AsyncResourceHandler::OnRequestRedirected(
     const net::RedirectInfo& redirect_info,
     ResourceResponse* response,
     bool* defer) {
-  const ResourceRequestInfoImpl* info = GetRequestInfo();
-  if (!info->filter())
+  DCHECK(GetRequestInfo()->requester_info().IsRenderer());
+  BrowserMessageFilter* filter = GetFilter();
+  if (!filter)
     return false;
 
   *defer = did_defer_ = true;
@@ -315,12 +317,13 @@ bool AsyncResourceHandler::OnRequestRedirected(
   // cookies? The only case where it can change is top-level navigation requests
   // and hopefully those will eventually all be owned by the browser. It's
   // possible this is still needed while renderer-owned ones exist.
-  return info->filter()->Send(new ResourceMsg_ReceivedRedirect(
+  return filter->Send(new ResourceMsg_ReceivedRedirect(
       GetRequestID(), redirect_info, response->head));
 }
 
 bool AsyncResourceHandler::OnResponseStarted(ResourceResponse* response,
                                              bool* defer) {
+  DCHECK(GetRequestInfo()->requester_info().IsRenderer());
   // For changes to the main frame, inform the renderer of the new URL's
   // per-host settings before the request actually commits.  This way the
   // renderer will be able to set these precisely at the time the
@@ -331,7 +334,8 @@ bool AsyncResourceHandler::OnResponseStarted(ResourceResponse* response,
 
   progress_timer_.Stop();
   const ResourceRequestInfoImpl* info = GetRequestInfo();
-  if (!info->filter())
+  BrowserMessageFilter* filter = GetFilter();
+  if (!filter)
     return false;
 
   // We want to send a final upload progress message prior to sending the
@@ -360,16 +364,15 @@ bool AsyncResourceHandler::OnResponseStarted(ResourceResponse* response,
 
   response->head.request_start = request()->creation_time();
   response->head.response_start = TimeTicks::Now();
-  info->filter()->Send(new ResourceMsg_ReceivedResponse(GetRequestID(),
-                                                        response->head));
+  filter->Send(
+      new ResourceMsg_ReceivedResponse(GetRequestID(), response->head));
   sent_received_response_msg_ = true;
 
   if (request()->response_info().metadata.get()) {
     std::vector<char> copy(request()->response_info().metadata->data(),
                            request()->response_info().metadata->data() +
                                request()->response_info().metadata->size());
-    info->filter()->Send(new ResourceMsg_ReceivedCachedMetadata(GetRequestID(),
-                                                                copy));
+    filter->Send(new ResourceMsg_ReceivedCachedMetadata(GetRequestID(), copy));
   }
 
   inlining_helper_->OnResponseReceived(*response);
@@ -377,6 +380,7 @@ bool AsyncResourceHandler::OnResponseStarted(ResourceResponse* response,
 }
 
 bool AsyncResourceHandler::OnWillStart(const GURL& url, bool* defer) {
+  DCHECK(GetRequestInfo()->requester_info().IsRenderer());
   if (GetRequestInfo()->is_upload_progress_enabled() &&
       request()->has_upload()) {
     ReportUploadProgress();
@@ -392,6 +396,7 @@ bool AsyncResourceHandler::OnWillStart(const GURL& url, bool* defer) {
 bool AsyncResourceHandler::OnWillRead(scoped_refptr<net::IOBuffer>* buf,
                                       int* buf_size,
                                       int min_size) {
+  DCHECK(GetRequestInfo()->requester_info().IsRenderer());
   DCHECK_EQ(-1, min_size);
 
   if (!CheckForSufficientResource())
@@ -416,12 +421,13 @@ bool AsyncResourceHandler::OnWillRead(scoped_refptr<net::IOBuffer>* buf,
 }
 
 bool AsyncResourceHandler::OnReadCompleted(int bytes_read, bool* defer) {
+  DCHECK(GetRequestInfo()->requester_info().IsRenderer());
   DCHECK_GE(bytes_read, 0);
 
   if (!bytes_read)
     return true;
 
-  ResourceMessageFilter* filter = GetFilter();
+  BrowserMessageFilter* filter = GetFilter();
   if (!filter)
     return false;
 
@@ -467,9 +473,10 @@ bool AsyncResourceHandler::OnReadCompleted(int bytes_read, bool* defer) {
 }
 
 void AsyncResourceHandler::OnDataDownloaded(int bytes_downloaded) {
+  DCHECK(GetRequestInfo()->requester_info().IsRenderer());
   int encoded_data_length = CalculateEncodedDataLengthToReport();
 
-  ResourceMessageFilter* filter = GetFilter();
+  BrowserMessageFilter* filter = GetFilter();
   if (filter) {
     filter->Send(new ResourceMsg_DataDownloaded(
         GetRequestID(), bytes_downloaded, encoded_data_length));
@@ -479,8 +486,10 @@ void AsyncResourceHandler::OnDataDownloaded(int bytes_downloaded) {
 void AsyncResourceHandler::OnResponseCompleted(
     const net::URLRequestStatus& status,
     bool* defer) {
+  DCHECK(GetRequestInfo()->requester_info().IsRenderer());
   const ResourceRequestInfoImpl* info = GetRequestInfo();
-  if (!info->filter())
+  BrowserMessageFilter* filter = GetFilter();
+  if (!filter)
     return;
 
   // If we crash here, figure out what URL the renderer was requesting.
@@ -513,7 +522,7 @@ void AsyncResourceHandler::OnResponseCompleted(
   request_complete_data.completion_time = TimeTicks::Now();
   request_complete_data.encoded_data_length =
       request()->GetTotalReceivedBytes();
-  info->filter()->Send(
+  filter->Send(
       new ResourceMsg_RequestComplete(GetRequestID(), request_complete_data));
 
   if (status.is_success())