Makes drops above the tabstrip work again. This stopped working...

chrome/browser/views/frame/browser_frame.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/views/frame/browser_frame.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include "chrome/browser/browser_list.h"
+#include "chrome/browser/views/frame/browser_root_view.h"
 #include "chrome/browser/views/frame/browser_view.h"
 #include "chrome/browser/views/frame/glass_browser_frame_view.h"
 #include "chrome/browser/views/frame/opaque_browser_frame_view.h"
 #include "chrome/common/resource_bundle.h"
 #include "chrome/common/win_util.h"
 #include "chrome/views/window_delegate.h"
 #include "grit/theme_resources.h"
 
 // static
 static const int kClientEdgeThickness = 3;
@@ skipping 172 matching lines @@
   else
     browser_frame_view_ = new OpaqueBrowserFrameView(this, browser_view_);
   return browser_frame_view_;
 }
 
 void BrowserFrame::UpdateFrameAfterFrameChange() {
   Window::UpdateFrameAfterFrameChange();
   UpdateDWMFrame();
 }
 
+
+views::RootView* BrowserFrame::CreateRootView() {
+  return new BrowserRootView(this);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserFrame, private:
 
 void BrowserFrame::UpdateDWMFrame() {
   // Nothing to do yet.
   if (!client_view() || !browser_view_->IsBrowserTypeNormal())
     return;
 
   // In fullscreen mode, we don't extend glass into the client area at all,
   // because the GDI-drawn text in the web content composited over it will
   // become semi-transparent over any glass area.
   MARGINS margins = { 0 };
   if (browser_view_->CanCurrentlyResize()) {
     margins.cxLeftWidth = kClientEdgeThickness + 1;
     margins.cxRightWidth = kClientEdgeThickness + 1;
     margins.cyBottomHeight = kClientEdgeThickness + 1;
   }
   // In maximized mode, we only have a titlebar strip of glass, no side/bottom
   // borders.
   if (!browser_view_->IsFullscreen()) {
     margins.cyTopHeight =
         GetBoundsForTabStrip(browser_view_->tabstrip()).bottom();
   }
   DwmExtendFrameIntoClientArea(GetHWND(), &margins);
 }