Plugin Power Saver: Throttled Plugins should block TCPSocket reads.

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 77c2d73a2284acdabb22614b39f0312a2145fb19..ad09da47c55cd68ea5602a92132135bdc914a1a2 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -1357,6 +1357,13 @@ 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.