Add support for constrained windows on os x, based on Avi's GTMWindowSheetController.

chrome/browser/cocoa/browser_window_controller.h

 // Copyright (c) 2009 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_COCOA_BROWSER_WINDOW_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_BROWSER_WINDOW_CONTROLLER_H_
 
 // A class acting as the Objective-C controller for the Browser
 // object. Handles interactions between Cocoa and the cross-platform
 // code. Each window has a single toolbar and, by virtue of being a
 // TabWindowController, a tab strip along the top.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_nsobject.h"
 #include "base/scoped_ptr.h"
 #import "chrome/browser/cocoa/tab_window_controller.h"
 #import "chrome/browser/cocoa/bookmark_bar_controller.h"
 #import "chrome/browser/cocoa/view_resizer.h"
 #import "third_party/GTM/AppKit/GTMTheme.h"
 
 class Browser;
 class BrowserWindow;
 class BrowserWindowCocoa;
+class ConstrainedWindowMac;
 @class DownloadShelfController;
 @class FindBarCocoaController;
+@class GTMWindowSheetController;
 @class InfoBarContainerController;
 class LocationBar;
 class StatusBubble;
 class TabContents;
 @class TabContentsController;
 @class TabStripController;
 class TabStripModelObserverBridge;
 @class TabStripView;
 @class ToolbarController;
 @class TitlebarController;
@@ skipping 93 matching lines @@
 - (void)userChangedTheme;
 
 // Executes the command in the context of the current browser.
 // |command| is an integer value containing one of the constants defined in the
 // "chrome/app/chrome_dll_resource.h" file.
 - (void)executeCommand:(int)command;
 
 // Delegate method for the status bubble to query about its vertical offset.
 - (float)verticalOffsetForStatusBubble;
 
+// Returns the (lazily created) window sheet controller of this window. Used
+// for the per-tab sheets.
+- (GTMWindowSheetController*)sheetController;
+
+// Checks if there are any tabs with sheets open, and if so, raises one of
+// the tabs with a sheet and returns NO.
+- (BOOL)shouldCloseWithOpenPerTabSheets;
+
+- (void)attachConstrainedWindow:(ConstrainedWindowMac*)window;
+- (void)removeConstrainedWindow:(ConstrainedWindowMac*)window;
+
 @end
 
 
 @interface BrowserWindowController(TestingAPI)
 
 // Put the incognito badge on the browser and adjust the tab strip
 // accordingly.
 - (void)installIncognitoBadge;
 
 // Allows us to initWithBrowser withOUT taking ownership of the browser.
 - (id)initWithBrowser:(Browser*)browser takeOwnership:(BOOL)ownIt;
 
 // Return an autoreleased NSWindow suitable for fullscreen use.
 - (NSWindow*)fullscreenWindow;
 
 @end  // BrowserWindowController(TestingAPI)
 
 #endif  // CHROME_BROWSER_COCOA_BROWSER_WINDOW_CONTROLLER_H_