Forward declare v8::Extension in chrome/renderer/extensions/*.

chrome/renderer/extensions/extension_process_bindings.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/renderer/extensions/extension_process_bindings.h"
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 24 matching lines @@
 #include "chrome/renderer/extensions/user_script_slave.h"
 #include "content/renderer/render_view.h"
 #include "content/renderer/render_view_visitor.h"
 #include "grit/common_resources.h"
 #include "grit/renderer_resources.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "v8/include/v8.h"
 #include "webkit/glue/webkit_glue.h"
 
 using WebKit::WebFrame;
 using WebKit::WebView;
 
 namespace {
 
 const char kExtensionName[] = "chrome/ExtensionProcessBindings";
 const char* kExtensionDeps[] = {
   EventBindings::kName,
@@ skipping 545 matching lines @@
   if (!retval.IsEmpty() && !retval->IsUndefined()) {
     std::string error = *v8::String::AsciiValue(retval);
     DCHECK(false) << error;
   }
 #endif
 
   request->second->context.Dispose();
   request->second->context.Clear();
   g_pending_requests.Get().erase(request);
 }