Properly scale the coordinate for TouchSelection when use-zoom-for-dsf mode is on.

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 90c24f7ddffc019a20e0a8717bb3c7f6e0b11db2..f9ff01135fd0945994e6a48332c9308c42ec1439 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1470,8 +1470,8 @@ void RenderViewImpl::OnMoveCaret(const gfx::Point& point) {
     return;
 
   Send(new InputHostMsg_MoveCaret_ACK(routing_id()));
-
-  webview()->focusedFrame()->moveCaretSelection(point);
+  webview()->focusedFrame()->moveCaretSelection(
+      ConvertWindowPointToViewport(point));
 }
 
 void RenderViewImpl::OnScrollFocusedEditableNodeIntoRect(