Add some missing ENABLE_PLUGINS ifdefs.

content/common/frame_messages.h

 // Copyright 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.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/frame_message_enums.h"
@@ skipping 582 matching lines @@
 
 // Following message is used to communicate the values received by the
 // callback binding the JS to Cpp.
 // An instance of browser that has an automation host listening to it can
 // have a javascript send a native value (string, number, boolean) to the
 // listener in Cpp. (DomAutomationController)
 IPC_MESSAGE_ROUTED2(FrameHostMsg_DomOperationResponse,
                     std::string  /* json_string */,
                     int  /* automation_id */)
 
+#if defined(ENABLE_PLUGINS)
 // Sent to the browser when the renderer detects it is blocked on a pepper
 // plugin message for too long. This is also sent when it becomes unhung
 // (according to the value of is_hung). The browser can give the user the
 // option of killing the plugin.
 IPC_MESSAGE_ROUTED3(FrameHostMsg_PepperPluginHung,
                     int /* plugin_child_id */,
                     base::FilePath /* path */,
                     bool /* is_hung */)
 
 // Sent by the renderer process to indicate that a plugin instance has crashed.
@@ skipping 23 matching lines @@
 // necessary, and will return a handle to the channel on success.
 // On error an empty string is returned.
 IPC_SYNC_MESSAGE_CONTROL4_2(FrameHostMsg_OpenChannelToPlugin,
                             int /* render_frame_id */,
                             GURL /* url */,
                             GURL /* page_url */,
                             std::string /* mime_type */,
                             IPC::ChannelHandle /* channel_handle */,
                             content::WebPluginInfo /* info */)
 
+#endif  // defined(ENABLE_PLUGINS)
+
 // Acknowledge that we presented an ubercomp frame.
 //
 // See FrameMsg_CompositorFrameSwapped
 IPC_MESSAGE_ROUTED1(FrameHostMsg_CompositorFrameSwappedACK,
                     FrameHostMsg_CompositorFrameSwappedACK_Params /* params */)
 
 // Provides the result from handling BeforeUnload.  |proceed| matches the return
 // value of the frame's beforeunload handler: true if the user decided to
 // proceed with leaving the page.
 IPC_MESSAGE_ROUTED3(FrameHostMsg_BeforeUnload_ACK,
@@ skipping 104 matching lines @@
 IPC_MESSAGE_ROUTED0(FrameHostMsg_DidFirstVisuallyNonEmptyPaint)
 
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 
 // Message to show/hide a popup menu using native controls.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ShowPopup,
                     FrameHostMsg_ShowPopup_Params)
 IPC_MESSAGE_ROUTED0(FrameHostMsg_HidePopup)
 
 #endif