Expose flash playback status and volume control to content renderer

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 <stddef.h>
 #include <stdint.h>
 
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 // Saves the image at location x, y to the disk (if there indeed is an
 // image at that location).
 IPC_MESSAGE_ROUTED2(FrameMsg_SaveImageAt,
                     int /* x */,
                     int /* y */)
 
 #if defined(ENABLE_PLUGINS)
 // Notifies the renderer of updates to the Plugin Power Saver origin whitelist.
 IPC_MESSAGE_ROUTED1(FrameMsg_UpdatePluginContentOriginWhitelist,
                     std::set<url::Origin> /* origin_whitelist */)
+
+// This message notifies that the frame that the volume of the Pepper instance
+// for |pp_instance| should be changed to |volume|.
+IPC_MESSAGE_ROUTED2(FrameMsg_SetPepperVolume,
+                    int32_t /* pp_instance */,
+                    double /* volume */)
 #endif  // defined(ENABLE_PLUGINS)
 
 // Used to instruct the RenderFrame to go into "view source" mode. This should
 // only be sent to the main frame.
 IPC_MESSAGE_ROUTED0(FrameMsg_EnableViewSourceMode)
 
 // Tells the frame to suppress any further modal dialogs. This ensures that no
 // ScopedPageLoadDeferrer is on the stack for SwapOut.
 IPC_MESSAGE_ROUTED0(FrameMsg_SuppressFurtherDialogs)
 
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 // nearest find result in the sending frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_GetNearestFindResult_Reply,
                     int /* nfr_request_id */,
                     float /* distance */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.