Re-enable TouchSelectionOriginatingFromWebpageTest with some fixes and logs

ui/views/touchui/touch_selection_controller_impl.cc

Index: ui/views/touchui/touch_selection_controller_impl.cc
diff --git a/ui/views/touchui/touch_selection_controller_impl.cc b/ui/views/touchui/touch_selection_controller_impl.cc
index 8b6b35116c8cb117edee8b9d82fa3acf8a5cbb79..0d3ef4ebc7e6e733735e1bb73f3c112e0e66864d 100644
--- a/ui/views/touchui/touch_selection_controller_impl.cc
+++ b/ui/views/touchui/touch_selection_controller_impl.cc
@@ -193,7 +193,7 @@ class TouchSelectionControllerImpl::EditingHandleView
       case ui::ET_GESTURE_SCROLL_BEGIN:
         widget_->SetCapture(this);
         controller_->SetDraggingHandle(this);
-        drag_offset_ = event->y() - cursor_height() -
+        drag_offset_ = event->y() - cursor_height() +

[varunjain, 2013/08/30 16:52:08]

While you are here, mind adding a comment on drag_offset_? You can refer to the
ASCII figure at the top of the file and say something like drag_offset_ is the
offset between scroll event position and the cursor position reported to the
client_view_.

[mohsen, 2013/08/30 18:26:39]

Done.

             kSelectionHandleVerticalDragOffset;
         break;
       case ui::ET_GESTURE_SCROLL_UPDATE: {