Mac: Use high-quality interpolation to draw tabpose thumbnails.

gfx/scoped_cg_context_state_mac.h

+// 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.
+
+#ifndef GFX_SCOPED_CG_CONTEXT_STATE_MAC_H_
+#define GFX_SCOPED_CG_CONTEXT_STATE_MAC_H_
+
+#import <QuartzCore/QuartzCore.h>
+
+namespace gfx {
+
+class ScopedCGContextSaveGState {
+ public:
+  explicit ScopedCGContextSaveGState(CGContextRef context) : context_(context) {
+    CGContextSaveGState(context_);
+  }
+
+  ~ScopedCGContextSaveGState() {
+    CGContextRestoreGState(context_);
+  }
+
+ private:
+  CGContextRef context_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedCGContextSaveGState);
+};
+
+}  // namespace gfx
+
+#endif  // GFX_SCOPED_CG_CONTEXT_STATE_MAC_H_