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

chrome/browser/cocoa/tab_strip_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_TAB_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_TAB_STRIP_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_nsobject.h"
 #include "base/scoped_ptr.h"
 #import "chrome/browser/cocoa/tab_controller_target.h"
+#import "third_party/GTM/AppKit/GTMWindowSheetController.h"
 
 @class TabView;
 @class TabStripView;
 
 class Browser;
+class ConstrainedWindowMac;
 class TabStripModelObserverBridge;
 class TabStripModel;
 class TabContents;
 class ToolbarModel;
 
 // A class that handles managing the tab strip in a browser window. It uses
 // a supporting C++ bridge object to register for notifications from the
 // TabStripModel. The Obj-C part of this class handles drag and drop and all
 // the other Cocoa-y aspects.
 //
 // When a new tab is created, we create a TabController which manages loading
 // the contents, including toolbar, from a separate nib file. This controller
 // then handles replacing the contentView of the window. As tabs are switched,
 // the single child of the contentView is swapped around to hold the contents
 // (toolbar and all) representing that tab.
 
-@interface TabStripController : NSObject <TabControllerTarget> {
+@interface TabStripController :
+  NSObject<TabControllerTarget,
+           GTMWindowSheetControllerDelegate> {
  @private
   TabContents* currentTab_;   // weak, tab for which we're showing state
   TabStripView* tabView_;  // weak
   NSView* switchView_;  // weak
   scoped_nsobject<NSView> dragBlockingView_;  // avoid bad window server drags
   NSButton* newTabButton_;  // weak, obtained from the nib.
   scoped_ptr<TabStripModelObserverBridge> bridge_;
   Browser* browser_;  // weak
   TabStripModel* tabModel_;  // weak
   // access to the TabContentsControllers (which own the parent view
@@ skipping 25 matching lines @@
   // A tracking area that's the size of the tab strip used to be notified
   // when the mouse leaves the tab strip. It's installed when the user clicks
   // the close box of a tab and is removed when they move the mouse outside
   // of the strip. When they do, we resize the tabs to use all available
   // space.
   scoped_nsobject<NSTrackingArea> closeTabTrackingArea_;
 
   // Array of subviews which are permanent (and which should never be removed),
   // such as the new-tab button, but *not* the tabs themselves.
   scoped_nsobject<NSMutableArray> permanentSubviews_;
+
+  // Manages per-tab sheets.
+  scoped_nsobject<GTMWindowSheetController> sheetController_;
 }
 
 // Initialize the controller with a view and browser that contains
 // everything else we'll need. |switchView| is the view whose contents get
 // "switched" every time the user switches tabs. The children of this view
 // will be released, so if you want them to stay around, make sure
 // you have retained them.
 - (id)initWithView:(TabStripView*)view
         switchView:(NSView*)switchView
            browser:(Browser*)browser;
@@ skipping 30 matching lines @@
 - (void)showNewTabButton:(BOOL)show;
 
 // Force the tabs to rearrange themselves to reflect the current model.
 - (void)layoutTabs;
 
 // The user changed the theme.
 - (void)userChangedTheme;
 
 // Default height for tabs.
 + (CGFloat)defaultTabHeight;
+
+// Returns the (lazily created) window sheet controller of this window. Used
+// for the per-tab sheets.
+- (GTMWindowSheetController*)sheetController;
+
+- (void)attachConstrainedWindow:(ConstrainedWindowMac*)window;
+- (void)removeConstrainedWindow:(ConstrainedWindowMac*)window;
+
 @end
 
 // Notification sent when the number of tabs changes. The object will be this
 // controller.
 extern NSString* const kTabStripNumberOfTabsChanged;
 
 #endif  // CHROME_BROWSER_COCOA_TAB_STRIP_CONTROLLER_H_