[TTS] Add an ACK message to SelectWordAroundCaret.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 3f21403e359259cfde64d065611d1f2f69344044..5316552ef54be17d0ed5b8d7f1590fcd239729b6 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1276,7 +1276,18 @@ void RenderViewImpl::OnSelectWordAroundCaret() {
     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);
 }