Instant: Use only one hidden WebContents per profile.

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

Index: chrome/browser/ui/cocoa/tab_contents/preview_drop_shadow_view.mm
diff --git a/chrome/browser/ui/cocoa/tab_contents/preview_drop_shadow_view.mm b/chrome/browser/ui/cocoa/tab_contents/preview_drop_shadow_view.mm
deleted file mode 100644
index 505a1c00daf3b7db4b21952f93de91027db06e20..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/cocoa/tab_contents/preview_drop_shadow_view.mm
+++ /dev/null
@@ -1,32 +0,0 @@
-// 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/preview_drop_shadow_view.h"
-
-#include "grit/theme_resources.h"
-#include "ui/base/resource/resource_bundle.h"
-
-@implementation PreviewDropShadowView
-
-+ (CGFloat)preferredHeight {
-  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-  NSImage* shadowImage =
-      rb.GetNativeImageNamed(IDR_PREVIEW_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_PREVIEW_DROP_SHADOW).ToNSImage();
-  [shadowImage drawInRect:bounds
-                 fromRect:NSZeroRect
-                operation:NSCompositeSourceOver
-                 fraction:1.0];
-}
-
-@end