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

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index bfdbd00b584f1cc29e3d072122a635888e052669..d30c53ac49c48abaa442b21c217cf32f8b97f2ee 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1770,9 +1770,9 @@ void RenderFrameImpl::OnSelectRange(const gfx::Point& base,
                                     const gfx::Point& extent) {
   // This IPC is dispatched by RenderWidgetHost, so use its routing id.
   Send(new InputHostMsg_SelectRange_ACK(GetRenderWidget()->routing_id()));
-
   base::AutoReset<bool> handling_select_range(&handling_select_range_, true);
-  frame_->selectRange(base, extent);
+  frame_->selectRange(render_view_->ConvertWindowPointToViewport(base),
+                      render_view_->ConvertWindowPointToViewport(extent));
 }
 
 void RenderFrameImpl::OnAdjustSelectionByCharacterOffset(int start_adjust,
@@ -1808,9 +1808,9 @@ void RenderFrameImpl::OnMoveRangeSelectionExtent(const gfx::Point& point) {
   // This IPC is dispatched by RenderWidgetHost, so use its routing id.
   Send(new InputHostMsg_MoveRangeSelectionExtent_ACK(
       GetRenderWidget()->routing_id()));
-
   base::AutoReset<bool> handling_select_range(&handling_select_range_, true);
-  frame_->moveRangeSelectionExtent(point);
+  frame_->moveRangeSelectionExtent(
+      render_view_->ConvertWindowPointToViewport(point));
 }
 
 void RenderFrameImpl::OnReplace(const base::string16& text) {