Move RenderViewHostObserver to content/public/browser/ and put it into the content namespace.

chrome/browser/extensions/extension_function.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/browser/extensions/extension_function.h"
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 10 matching lines @@
 using content::BrowserThread;
 
 // static
 void ExtensionFunctionDeleteTraits::Destruct(const ExtensionFunction* x) {
   x->Destruct();
 }
 
 UIThreadExtensionFunction::RenderViewHostTracker::RenderViewHostTracker(
     UIThreadExtensionFunction* function,
     RenderViewHost* render_view_host)
-    : RenderViewHostObserver(render_view_host),
+    : content::RenderViewHostObserver(render_view_host),
       function_(function) {
   registrar_.Add(this,
                  content::NOTIFICATION_RENDER_VIEW_HOST_DELETED,
                  content::Source<RenderViewHost>(function->render_view_host()));
 }
 
 void UIThreadExtensionFunction::RenderViewHostTracker::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
@@ skipping 187 matching lines @@
 
 SyncIOThreadExtensionFunction::SyncIOThreadExtensionFunction() {
 }
 
 SyncIOThreadExtensionFunction::~SyncIOThreadExtensionFunction() {
 }
 
 void SyncIOThreadExtensionFunction::Run() {
   SendResponse(RunImpl());
 }