[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 80eba094cebbfc955babe931fb9559c6f4c41477..b6f0c7c31ef365b69fe39fad61ff5914551bd417 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1280,12 +1280,28 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
 }
 
 void RenderViewImpl::OnSelectWordAroundCaret() {
-  if (!webview())
-    return;
+  // Set default values for the ACK
+  bool did_select = false;
+  int start_adjust = 0;
+  int end_adjust = 0;
 
-  input_handler_->set_handling_input_event(true);
-  webview()->FocusedFrame()->SelectWordAroundCaret();
-  input_handler_->set_handling_input_event(false);
+  if (webview()) {
+    auto* focused_frame = GetWebView()->FocusedFrame();

[aelias_OOO_until_Jul13, 2017/05/15 17:46:20]

nit: please avoid 'auto' here, type is likely not messy-looking enough to
justify.

[Donn Denman, 2017/05/15 21:13:14]

Done.

+    if (focused_frame) {
+      input_handler_->set_handling_input_event(true);
+      blink::WebRange initial_range = focused_frame->SelectionRange();
+      did_select = focused_frame->SelectWordAroundCaret();
+      if (did_select) {
+        blink::WebRange adjusted_range = focused_frame->SelectionRange();
+        start_adjust =
+            adjusted_range.StartOffset() - initial_range.StartOffset();
+        end_adjust = adjusted_range.EndOffset() - initial_range.EndOffset();
+      }
+      input_handler_->set_handling_input_event(false);
+    }
+  }
+  Send(new ViewHostMsg_SelectWordAroundCaretAck(GetRoutingID(), did_select,
+                                                start_adjust, end_adjust));
 }
 
 void RenderViewImpl::OnUpdateTargetURLAck() {