Rework the way Widget::Init works:

chrome/browser/ui/views/tabs/dragged_tab_view.cc

 // Copyright (c) 2011 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/ui/views/tabs/dragged_tab_view.h"
 
 #include "base/stl_util-inl.h"
 #include "chrome/browser/ui/views/tabs/native_view_photobooth.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "ui/gfx/canvas_skia.h"
@@ skipping 21 matching lines @@
                                const gfx::Size& contents_size,
                                NativeViewPhotobooth* photobooth)
     : renderers_(renderers),
       renderer_bounds_(renderer_bounds),
       show_contents_on_drag_(true),
       mouse_tab_offset_(mouse_tab_offset),
       photobooth_(photobooth),
       contents_size_(contents_size) {
   set_parent_owned(false);
 
-  views::Widget::CreateParams params(views::Widget::CreateParams::TYPE_POPUP);
-  params.transparent = true;
-  params.keep_on_top = true;
-  params.delete_on_destroy = false;
-  container_.reset(views::Widget::CreateWidget(params));
+  container_.reset(views::Widget::CreateWidget());
 #if defined(OS_WIN)
   static_cast<views::WidgetWin*>(container_.get())->
       set_can_update_layered_window(false);
 
   BOOL drag;
   if ((::SystemParametersInfo(SPI_GETDRAGFULLWINDOWS, 0, &drag, 0) != 0) &&
       (drag == FALSE)) {
     show_contents_on_drag_ = false;
   }
 #endif
-  gfx::Size container_size(PreferredContainerSize());
-  container_->Init(NULL, gfx::Rect(gfx::Point(), container_size));
+  views::Widget::CreateParams params(views::Widget::CreateParams::TYPE_POPUP);
+  params.transparent = true;
+  params.keep_on_top = true;
+  params.delete_on_destroy = false;
+  params.bounds = gfx::Rect(PreferredContainerSize());
+  container_->Init(params);
   container_->SetContentsView(this);
   container_->SetOpacity(kTransparentAlpha);
-  container_->SetBounds(gfx::Rect(gfx::Point(), container_size));
+  container_->SetBounds(gfx::Rect(gfx::Point(), params.bounds.size()));
 }
 
 DraggedTabView::~DraggedTabView() {
   parent()->RemoveChildView(this);
   container_->CloseNow();
   STLDeleteElements(&renderers_);
 }
 
 void DraggedTabView::MoveTo(const gfx::Point& screen_point) {
   int x;
@@ skipping 115 matching lines @@
 }
 
 gfx::Size DraggedTabView::PreferredContainerSize() {
   gfx::Size ps = GetPreferredSize();
   return gfx::Size(ScaleValue(ps.width()), ScaleValue(ps.height()));
 }
 
 int DraggedTabView::ScaleValue(int value) {
   return static_cast<int>(value * kScalingFactor);
 }