Create a ResourceMessageFilter to filter resource related IPCs. This gets ri...

chrome/browser/renderer_host/resource_message_filter.h

Index: chrome/browser/renderer_host/resource_message_filter.h
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--- chrome/browser/renderer_host/resource_message_filter.h	(revision 0)
+++ chrome/browser/renderer_host/resource_message_filter.h	(revision 0)
@@ -0,0 +1,70 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_RENDERER_HOST_RESOURCE_MESSAGE_FILTER_H_
+#define CHROME_BROWSER_RENDERER_HOST_RESOURCE_MESSAGE_FILTER_H_
+
+#include "base/scoped_ptr.h"
+#include "chrome/browser/browser_message_filter.h"
+#include "chrome/common/child_process_info.h"
+#include "webkit/glue/resource_type.h"
+
+class ChromeURLRequestContext;
+class ResourceDispatcherHost;
+class URLRequestContext;
+
+// This class filters out incoming IPC messages for network requests and
+// processes them on the IPC thread.  As a result, network requests are not
+// delayed by costly UI processing that may be occuring on the main thread of
+// the browser.  It also means that any hangs in starting a network request
+// will not interfere with browser UI.
+class ResourceMessageFilter : public BrowserMessageFilter {
+ public:
+  // Allows overriding the URLRequestContext used to service requests.
+  class URLRequestContextOverride
+      : public base::RefCountedThreadSafe<URLRequestContextOverride> {
+   public:
+    virtual URLRequestContext* GetRequestContext(
+        uint32 request_id, ResourceType::Type resource_type) = 0;
+  };
+
+  ResourceMessageFilter(int child_id,
+                        ChildProcessInfo::ProcessType process_type,
+                        ResourceDispatcherHost* resource_dispatcher_host);
+
+  // BrowserMessageFilter implementation.
+  virtual void OnChannelClosing();
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok);
+
+  // Returns the URLRequestContext for the given request.
+  ChromeURLRequestContext* GetURLRequestContext(
+      uint32 request_id, ResourceType::Type resource_type);
+
+  void set_url_request_context_override(URLRequestContextOverride* u) {
+    url_request_context_override_ = u;
+  }
+
+  int child_id() const { return child_id_; }
+  ChildProcessInfo::ProcessType process_type() const { return process_type_; }
+
+ protected:
+  // Protected destructor so that we can be overriden in tests.
+  ~ResourceMessageFilter();
+
+ private:
+  // The ID of the child process.
+  int child_id_;
+
+  ChildProcessInfo::ProcessType process_type_;
+
+  // Owned by BrowserProcess, which is guaranteed to outlive us.
+  ResourceDispatcherHost* resource_dispatcher_host_;
+
+  scoped_refptr<URLRequestContextOverride> url_request_context_override_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(ResourceMessageFilter);
+};
+
+#endif  // CHROME_BROWSER_RENDERER_HOST_RESOURCE_MESSAGE_FILTER_H_
Property changes on: chrome\browser\renderer_host\resource_message_filter.h
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