[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 65b2fdc53609d0d663e60780b1b5f3c3eb536451..70302b9dd02890820f8ad81e4e93464e83e92fb6 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1296,7 +1296,18 @@ 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);
 }