[TTS] Add an ACK message to SelectWordAroundCaret.

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 
@@ skipping 1278 matching lines @@
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void RenderViewImpl::OnSelectWordAroundCaret() {
   if (!webview())
     return;
 
   input_handler_->set_handling_input_event(true);
-  webview()->focusedFrame()->selectWordAroundCaret();
+  int start_adjust = 0;
+  int end_adjust = 0;
+  blink::WebRange initial_range = webview()->focusedFrame()->selectionRange();
+  bool did_select = webview()->focusedFrame()->selectWordAroundCaret();
+  if (did_select) {
+    blink::WebRange adjusted_range =
+        webview()->focusedFrame()->selectionRange();
+    start_adjust = adjusted_range.startOffset() - initial_range.startOffset();
+    end_adjust = adjusted_range.endOffset() - initial_range.endOffset();
+  }
+  Send(new ViewHostMsg_SelectWordAroundCaretAck(GetRoutingID(), did_select,
+                                                start_adjust, end_adjust));
   input_handler_->set_handling_input_event(false);
 }
 
 void RenderViewImpl::OnUpdateTargetURLAck() {
   // Check if there is a targeturl waiting to be sent.
   if (target_url_status_ == TARGET_PENDING)
     Send(new ViewHostMsg_UpdateTargetURL(GetRoutingID(), pending_target_url_));
 
   target_url_status_ = TARGET_NONE;
 }
@@ skipping 1408 matching lines @@
                             INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   }
 
   std::unique_ptr<InputEventAck> ack(
       new InputEventAck(InputEventAckSource::MAIN_THREAD, input_event->type(),
                         INPUT_EVENT_ACK_STATE_NOT_CONSUMED));
   OnInputEventAck(std::move(ack));
 }
 
 }  // namespace content