Makes RenderFrameObserver/RenderViewObserver::OnDestruct pure virtual.

content/renderer/pepper/plugin_power_saver_helper.cc

 // Copyright 2014 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 "content/renderer/pepper/plugin_power_saver_helper.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 48 matching lines @@
 bool PluginPowerSaverHelper::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PluginPowerSaverHelper, message)
   IPC_MESSAGE_HANDLER(FrameMsg_UpdatePluginContentOriginWhitelist,
                       OnUpdatePluginContentOriginWhitelist)
   IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
+void PluginPowerSaverHelper::OnDestruct() {
+  delete this;
+}
+
 void PluginPowerSaverHelper::OnUpdatePluginContentOriginWhitelist(
     const std::set<url::Origin>& origin_whitelist) {
   origin_whitelist_ = origin_whitelist;
 
   // Check throttled plugin instances to see if any can be unthrottled.
   auto it = peripheral_plugins_.begin();
   while (it != peripheral_plugins_.end()) {
     if (origin_whitelist.count(it->content_origin)) {
       // Because the unthrottle callback may register another peripheral plugin
       // and invalidate our iterator, we cannot run it synchronously.
@@ skipping 39 matching lines @@
 
 void PluginPowerSaverHelper::WhitelistContentOrigin(
     const url::Origin& content_origin) {
   if (origin_whitelist_.insert(content_origin).second) {
     Send(new FrameHostMsg_PluginContentOriginAllowed(
         render_frame()->GetRoutingID(), content_origin));
   }
 }
 
 }  // namespace content