It turns out I had the sense of the GetLocalBounds bool wrong everywhere, so ...

chrome/browser/ui/views/list_background.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_LIST_BACKGROUND_H_
 #define CHROME_BROWSER_UI_VIEWS_LIST_BACKGROUND_H_
 #pragma once
 
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/native_theme_win.h"
 #include "views/background.h"
 
 // A background object that paints the scrollable list background,
 // which may be rendered by the system visual styles system.
 class ListBackground : public views::Background {
  public:
   explicit ListBackground() {
     SkColor list_color =
         gfx::NativeTheme::instance()->GetThemeColorWithDefault(
         gfx::NativeTheme::LIST, 1, TS_NORMAL, TMT_FILLCOLOR, COLOR_WINDOW);
     SetNativeControlColor(list_color);
   }
   virtual ~ListBackground() {}
 
   virtual void Paint(gfx::Canvas* canvas, views::View* view) const {
     HDC dc = canvas->BeginPlatformPaint();
-    RECT native_lb = view->GetContentsBounds().ToRECT();
+    RECT native_lb = view->GetLocalBounds().ToRECT();
     gfx::NativeTheme::instance()->PaintListBackground(dc, true, &native_lb);
     canvas->EndPlatformPaint();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ListBackground);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LIST_BACKGROUND_H_