Plumb ClearNativeFocus to DesktopRootWindowHostWin.

ui/views/widget/desktop_root_window_host_win.cc

Index: ui/views/widget/desktop_root_window_host_win.cc
===================================================================
--- ui/views/widget/desktop_root_window_host_win.cc	(revision 157553)
+++ ui/views/widget/desktop_root_window_host_win.cc	(working copy)
@@ -206,6 +206,10 @@
   message_handler_->SetTitle(title);
 }
 
+void DesktopRootWindowHostWin::ClearNativeFocus() {
+  message_handler_->ClearNativeFocus();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopRootWindowHostWin, RootWindowHost implementation:
 
@@ -510,6 +514,8 @@
 }
 
 bool DesktopRootWindowHostWin::HandleMouseEvent(const ui::MouseEvent& event) {
+  if (event.flags() & ui::EF_IS_NON_CLIENT)
+    return false;
   return root_window_host_delegate_->OnHostMouseEvent(
       const_cast<ui::MouseEvent*>(&event));
 }