Enable Clang warnings in implementation files for OS X

chrome/browser/ui/cocoa/extensions/extension_popup_controller.mm

 // Copyright (c) 2012 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.
 
 #import "chrome/browser/ui/cocoa/extensions/extension_popup_controller.h"
 
 #include <algorithm>
 
 #include "base/callback.h"
 #include "chrome/browser/devtools/devtools_window.h"
@@ skipping 75 matching lines @@
   explicit DevtoolsNotificationBridge(ExtensionPopupController* controller)
     : controller_(controller),
       render_view_host_([controller_ extensionHost]->render_view_host()),
       devtools_callback_(base::Bind(
           &DevtoolsNotificationBridge::OnDevToolsStateChanged,
           base::Unretained(this))) {
     content::DevToolsManager::GetInstance()->AddAgentStateCallback(
         devtools_callback_);
   }
 
-  ~DevtoolsNotificationBridge() {
+  virtual ~DevtoolsNotificationBridge() {
     content::DevToolsManager::GetInstance()->RemoveAgentStateCallback(
         devtools_callback_);
   }
 
   void OnDevToolsStateChanged(content::DevToolsAgentHost* agent_host,
                               bool attached) {
     if (agent_host->GetRenderViewHost() != render_view_host_)
       return;
 
     if (attached) {
@@ skipping 272 matching lines @@
   return minSize;
 }
 
 // Private (TestingAPI)
 + (NSSize)maxPopupSize {
   NSSize maxSize = {ExtensionViewMac::kMaxWidth, ExtensionViewMac::kMaxHeight};
   return maxSize;
 }
 
 @end