Switch ContentSettingsObserver to be a RenderFrameObserver instead of a RenderViewObserver

chrome/browser/guestview/webview/plugin_permission_helper.cc

 // Copyright (c) 2013 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/guestview/webview/plugin_permission_helper.h"
 
 #include "chrome/browser/guestview/webview/webview_guest.h"
 #include "chrome/browser/guestview/webview/webview_permission_types.h"
 #include "chrome/browser/plugins/chrome_plugin_service_filter.h"
 #include "chrome/common/render_messages.h"
@@ skipping 84 matching lines @@
 }
 
 void PluginPermissionHelper::OnRemovePluginPlaceholderHost(int placeholder_id) {
 }
 #endif // defined(ENABLE_PLUGIN_INSTALLATION)
 
 void PluginPermissionHelper::OnPermissionResponse(const std::string& identifier,
                                                   bool allow,
                                                   const std::string& input) {
   if (allow) {
-    RenderViewHost* host = web_contents()->GetRenderViewHost();
     ChromePluginServiceFilter::GetInstance()->AuthorizeAllPlugins(
-        host->GetProcess()->GetID());
-    host->Send(new ChromeViewMsg_LoadBlockedPlugins(
-        host->GetRoutingID(), identifier));
+        web_contents(), true, identifier);
   }
 }