Header cleanup in chrome/renderer/.

chrome/renderer/render_thread.h

Index: chrome/renderer/render_thread.h
diff --git a/chrome/renderer/render_thread.h b/chrome/renderer/render_thread.h
index 22b38bec9b6f7f6abc52a4a01a5136e527ab212c..55d53d6ddb8fc7dd7431e8e3fda72c3d53f025aa 100644
--- a/chrome/renderer/render_thread.h
+++ b/chrome/renderer/render_thread.h
@@ -6,13 +6,11 @@
 #define CHROME_RENDERER_RENDER_THREAD_H_
 #pragma once
 
-#include <set>
 #include <string>
 #include <vector>
 
 #include "base/shared_memory.h"
 #include "base/string16.h"
-#include "base/task.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "build/build_config.h"
@@ -20,7 +18,6 @@
 #include "chrome/common/css_colors.h"
 #include "chrome/renderer/visitedlink_slave.h"
 #include "gfx/native_widget_types.h"
-#include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_platform_file.h"
 
 class AppCacheDispatcher;
@@ -49,6 +46,10 @@ struct ViewMsg_ExtensionExtentsUpdated_Params;
 struct ViewMsg_New_Params;
 struct WebPreferences;
 
+namespace IPC {
+struct ChannelHandle;
+}
+
 namespace WebKit {
 class WebStorageEventDispatcher;
 }