Fix keyboard focus for OOPIF-<webview>.

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>
 
@@ skipping 808 matching lines @@
 // Update a proxy's replicated origin.  Used when the frame is navigated to a
 // new origin.
 IPC_MESSAGE_ROUTED2(FrameMsg_DidUpdateOrigin,
                     url::Origin /* origin */,
                     bool /* is potentially trustworthy unique origin */)
 
 // Notifies this frame or proxy that it is now focused.  This is used to
 // support cross-process focused frame changes.
 IPC_MESSAGE_ROUTED0(FrameMsg_SetFocusedFrame)
 
+// Notifies this frame or proxy that it is no longer focused. This is used when
+// a frame in the embedder that the guest cannot see (<webview>) gains focus.
+IPC_MESSAGE_ROUTED0(FrameMsg_ClearFocusedFrame)
+
 // Sent to a frame proxy when its real frame is preparing to enter fullscreen
 // in another process.  Actually entering fullscreen will be done separately as
 // part of ViewMsg_Resize, once the browser process has resized the tab for
 // fullscreen.
 IPC_MESSAGE_ROUTED0(FrameMsg_WillEnterFullscreen)
 
 // Send to the RenderFrame to set text tracks state and style settings.
 // Sent for top-level frames.
 IPC_MESSAGE_ROUTED1(FrameMsg_SetTextTrackSettings,
                     FrameMsg_TextTrackSettings_Params /* params */)
@@ skipping 737 matching lines @@
 // 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.