Plugin Power Saver: Throttled Plugins should block TCPSocket reads.

content/common/view_messages.h

 // 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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
@@ skipping 1339 matching lines @@
                      base::FilePath /* path */)
 
 // A renderer sends this to the browser process when it wants to access a PPAPI
 // broker. In contrast to ViewHostMsg_OpenChannelToPpapiBroker, this is called
 // for every connection.
 // The browser will respond with ViewMsg_PpapiBrokerPermissionResult.
 IPC_MESSAGE_ROUTED3(ViewHostMsg_RequestPpapiBrokerPermission,
                     int /* routing_id */,
                     GURL /* document_url */,
                     base::FilePath /* plugin_path */)
+
+// A renderer sends this to the browser process when it throttles or unthrottles
+// a plugin instance for the Plugin Power Saver feature.
+IPC_MESSAGE_CONTROL3(ViewHostMsg_PluginInstanceThrottleStateChange,
+                     int /* plugin_child_id */,
+                     int32 /* pp_instance */,
+                     bool /* is_throttled */)
 #endif  // defined(ENABLE_PLUGINS)
 
 // Send the tooltip text for the current mouse position to the browser.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_SetTooltipText,
                     base::string16 /* tooltip text string */,
                     blink::WebTextDirection /* text direction hint */)
 
 // Notification that the text selection has changed.
 // Note: The secound parameter is the character based offset of the
 // base::string16
@@ skipping 273 matching lines @@
 // cached by the OS. Please see RenderMessageFilter::OnPreCacheFontCharacters
 // for details.
 IPC_SYNC_MESSAGE_CONTROL2_0(ViewHostMsg_PreCacheFontCharacters,
                             LOGFONT /* font_data */,
                             base::string16 /* characters */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.