Instant Extended: Delete unused overlay code

chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.mm

-// Copyright 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.
-
-#import "chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.h"
-
-#import "chrome/browser/ui/cocoa/nsview_additions.h"
-#include "grit/theme_resources.h"
-#include "ui/base/resource/resource_bundle.h"
-
-@implementation OverlayTopSeparatorView
-
-+ (CGFloat)preferredHeight {
-  return 1;
-}
-
-- (void)drawRect:(NSRect)rect {
-  NSRect separatorRect = [self bounds];
-  separatorRect.size.height = [self cr_lineWidth];
-  [[self strokeColor] set];
-  NSRectFillUsingOperation(separatorRect, NSCompositeSourceOver);
-}
-
-@end
-
-@implementation OverlayBottomSeparatorView
-
-+ (CGFloat)preferredHeight {
-  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-  NSImage* shadowImage =
-      rb.GetNativeImageNamed(IDR_OVERLAY_DROP_SHADOW).ToNSImage();
-  return [shadowImage size].height;
-}
-
-- (void)drawRect:(NSRect)rect {
-  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-  NSRect bounds = [self bounds];
-
-  // Draw the shadow.
-  NSImage* shadowImage =
-      rb.GetNativeImageNamed(IDR_OVERLAY_DROP_SHADOW).ToNSImage();
-  [shadowImage drawInRect:bounds
-                 fromRect:NSZeroRect
-                operation:NSCompositeSourceOver
-                 fraction:1.0];
-}
-
-@end