Cocoa: Support constrained windows for platform apps

chrome/browser/ui/cocoa/extensions/shell_window_cocoa.h

 // Copyright (c) 2012 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_COCOA_EXTENSIONS_SHELL_WINDOW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_EXTENSIONS_SHELL_WINDOW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
 #include "base/memory/scoped_nsobject.h"
+#include "chrome/browser/ui/cocoa/constrained_window_mac.h"
 #include "chrome/browser/ui/extensions/shell_window.h"
 #include "chrome/common/extensions/draggable_region.h"
 #include "ui/gfx/rect.h"
+#import "third_party/GTM/AppKit/GTMWindowSheetController.h"
 
 class Profile;
 class ShellWindowCocoa;
 
 // A window controller for a minimal window to host a web app view. Passes
 // Objective-C notifications to the C++ bridge.
-@interface ShellWindowController : NSWindowController<NSWindowDelegate> {
+@interface ShellWindowController : NSWindowController
+                                  <NSWindowDelegate,
+                                   GTMWindowSheetControllerDelegate,
+                                   ConstrainedWindowSupport> {
  @private
-  ShellWindowCocoa* shellWindow_; // Weak; owns self.
+  ShellWindowCocoa* shellWindow_;  // Weak; owns self.
+  // Manages per-window sheets.
+  scoped_nsobject<GTMWindowSheetController> sheetController_;
 }
 
 @property(assign, nonatomic) ShellWindowCocoa* shellWindow;
 
 @end
 
 // Cocoa bridge to ShellWindow.
 class ShellWindowCocoa : public ShellWindow {
  public:
   ShellWindowCocoa(Profile* profile,
@@ skipping 55 matching lines @@
 
   scoped_nsobject<ShellWindowController> window_controller_;
   NSInteger attention_request_id_;  // identifier from requestUserAttention
 
   std::vector<extensions::DraggableRegion> draggable_regions_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellWindowCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_SHELL_WINDOW_COCOA_H_