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

views/controls/button/checkbox.cc

 // 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.
 
 #include "views/controls/button/checkbox.h"
 
 #include "base/logging.h"
 #include "ui/gfx/canvas.h"
 #include "views/controls/label.h"
 
@@ skipping 109 matching lines @@
 void Checkbox::PaintFocusBorder(gfx::Canvas* canvas) {
   // Our focus border is rendered by the label, so we don't do anything here.
 }
 
 View* Checkbox::GetViewForPoint(const gfx::Point& point) {
   return GetViewForPoint(point, false);
 }
 
 View* Checkbox::GetViewForPoint(const gfx::Point& point,
                                 bool can_create_floating) {
-  return GetContentsBounds().Contains(point) ? this : NULL;
+  return GetLocalBounds().Contains(point) ? this : NULL;
 }
 
 void Checkbox::OnMouseEntered(const MouseEvent& e) {
   native_wrapper_->SetPushed(HitTestLabel(e));
 }
 
 void Checkbox::OnMouseMoved(const MouseEvent& e) {
   native_wrapper_->SetPushed(HitTestLabel(e));
 }
 
@@ skipping 74 matching lines @@
 void Checkbox::Init(const std::wstring& label_text) {
   // Checkboxs don't need to enforce a minimum size.
   set_ignore_minimum_size(true);
   label_ = new Label(label_text);
   label_->SetHasFocusBorder(true);
   label_->SetHorizontalAlignment(Label::ALIGN_LEFT);
   AddChildView(label_);
 }
 
 }  // namespace views