[TTS] Add an ACK message to SelectWordAroundCaret.

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 82ffcc94291e1c74b432132e9eefe31bfa027c6f..26b13561981af4a5bd521494e92e86d97e57a70f 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -868,6 +868,13 @@ IPC_MESSAGE_ROUTED0(ViewHostMsg_DidFirstVisuallyNonEmptyPaint)
 // Sent in reply to ViewMsg_WaitForNextFrameForTests.
 IPC_MESSAGE_ROUTED0(ViewHostMsg_WaitForNextFrameForTests_ACK)
 
+// Acknowledges that a SelectWordAroundCaret completed with the specified
+// result and adjustments to the selection offsets.
+IPC_MESSAGE_ROUTED3(ViewHostMsg_SelectWordAroundCaretAck,

[aelias_OOO_until_Jul13, 2017/04/27 22:01:27]

I'm not sure if this is planned for a later CL, but I think this and this
original ViewMsg should be changed to FrameMsg/render_frame things, for OOPIF
compatibility.

[Donn Denman, 2017/04/28 20:28:00]

I think this is best done in a separate CL to keep possible issues regarding
moving from view->frame separate from issues with updating CL for this ACK.

Is there a bug for moving to frame for OOPIF?

[aelias_OOO_until_Jul13, 2017/04/28 20:55:29]

I'm OK with separate CL personally.  The master bug is http://crbug.com/304341

[Donn Denman, 2017/04/28 21:54:41]

Great, filed blocking bug to do that.

+                    bool /* did_select */,
+                    int /* start_adjust */,
+                    int /* end_adjust */)
+
 #if defined(OS_ANDROID)
 // Notifies that an unhandled tap has occurred at the specified x,y position
 // and that the UI may need to be triggered.