[rAc OSX] Fix reversed use of top and bottom padding.

chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.mm

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h"
 
 #include "base/bind.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 446 matching lines @@
   // bottom of the browser window.
   size.height = std::min(size.height, [self maxHeight]);
 
   return size;
 }
 
 - (void)performLayout {
   NSRect contentRect = NSZeroRect;
   contentRect.size = [self preferredSize];
   NSRect clientRect = contentRect;
-  clientRect.origin.y = chrome_style::kClientBottomPadding;
+  clientRect.origin.y = chrome_style::kTitleTopPadding;
   clientRect.size.height -= chrome_style::kTitleTopPadding +
                             chrome_style::kClientBottomPadding;
 
   [titleTextField_ setStringValue:
       base::SysUTF16ToNSString(autofillDialog_->delegate()->DialogTitle())];
   [titleTextField_ sizeToFit];
 
   NSRect headerRect, mainRect, titleRect, dummyRect;
   NSDivideRect(clientRect, &headerRect, &mainRect,
                kAccountChooserHeight, NSMinYEdge);
@@ skipping 192 matching lines @@
 
 - (content::WebContents*)getSignInWebContents {
   return [signInContainer_ webContents];
 }
 
 - (BOOL)IsShowingOverlay {
   return ![[overlayController_ view] isHidden];
 }
 
 @end