Fix uninitialized memory error caused by r50606.

chrome/browser/cocoa/tab_window_controller.mm

 // 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.
 
 #import "chrome/browser/cocoa/tab_window_controller.h"
 
 #include "app/theme_provider.h"
 #include "base/logging.h"
 #import "chrome/browser/cocoa/tab_strip_view.h"
 #import "chrome/browser/cocoa/themed_window.h"
@@ skipping 47 matching lines @@
                  NSWidth([sideTabStripView_ frame]),
                  NSHeight(contentFrame));
   [sideTabStripView_ setFrame:sideStripFrame];
   [contentView addSubview:sideTabStripView_];
 }
 
 // Add the top tab strop to the window, above the content box and add it to the
 // view hierarchy as a sibling of the content view so it can overlap with the
 // window frame.
 - (void)addTopTabStripToWindow {
+  NSRect contentFrame = [tabContentArea_ frame];
   NSRect tabFrame =
-      NSMakeRect(0, NSMaxY(tabFrame),

[viettrungluu, 2010/07/15 17:55:34]

I feel like the compiler should have noticed something amiss here.

-                 NSWidth([tabContentArea_ frame]),
+      NSMakeRect(0, NSMaxY(contentFrame),
+                 NSWidth(contentFrame),
                  NSHeight([topTabStripView_ frame]));
   [topTabStripView_ setFrame:tabFrame];
   NSView* contentParent = [[[self window] contentView] superview];
   [contentParent addSubview:topTabStripView_];
 }
 
 - (void)windowDidLoad {
   // Cache the difference in height between the window content area and the
   // tab content area.
   NSRect tabFrame = [tabContentArea_ frame];
@@ skipping 251 matching lines @@
   closeDeferred_ = YES;
 }
 
 // Called when the size of the window content area has changed. Override to
 // position specific views. Base class implementation does nothing.
 - (void)layoutSubviews {
   NOTIMPLEMENTED();
 }
 
 @end