Hook up the resize rect for Mac and enable its use in the renderer (mac-only)...

chrome/browser/cocoa/tab_strip_controller.mm

 // 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.
 
 #import "chrome/browser/cocoa/tab_strip_controller.h"
 
 #import "base/sys_string_conversions.h"
 #import "chrome/app/chrome_dll_resource.h"
 #import "chrome/browser/cocoa/tab_strip_view.h"
 #import "chrome/browser/cocoa/tab_cell.h"
@@ skipping 316 matching lines @@
   [controller updateToolbarWithContents:shouldRestore ? tab : nil];
 }
 
 - (void)setStarredState:(BOOL)isStarred {
   TabContents* selectedContents = model_->GetSelectedTabContents();
   TabContentsController* selectedController =
       [self controllerWithContents:selectedContents];
   [selectedController setStarredState:isStarred];
 }
 
+// Return the rect, in WebKit coordinates (flipped), of the window's grow box
+// in the coordinate system of the content area of the currently selected tab.
+// |windowGrowBox| needs to be in the window's coordinate system.
+- (NSRect)selectedTabGrowBoxFromWindowGrowBox:(NSRect)windowGrowBox {
+  TabContents* selectedContents = model_->GetSelectedTabContents();
+  if (!selectedContents) {
+    // When the window is initially being constructed, there may be no currently
+    // selected tab, so pick the first one. If there aren't any, just bail with
+    // an empty rect.
+    selectedContents = model_->GetTabContentsAt(0);
+    if (!selectedContents)
+      return NSMakeRect(0, 0, 0, 0);
+  }
+  TabContentsController* selectedController =
+      [self controllerWithContents:selectedContents];
+  return [selectedController growBoxFromWindowGrowBox:windowGrowBox];
+}
+
 @end
 
 //--------------------------------------------------------------------------
 
 TabStripBridge::TabStripBridge(TabStripModel* model, 
                                TabStripController* controller)
     : controller_(controller), model_(model) {
   // Register to be a listener on the model so we can get updates and tell
   // the TabStripController about them.
   model_->AddObserver(this);
@@ skipping 32 matching lines @@
   NOTIMPLEMENTED();
 }
 
 void TabStripBridge::TabChangedAt(TabContents* contents, int index) {
   [controller_ tabChangedWithContents:contents atIndex:index];
 }
 
 void TabStripBridge::TabStripEmpty() {
   NOTIMPLEMENTED();
 }