Mac: restore subpixel AA in the find bar when it doesn't have focus

ui/base/cocoa/controls/blue_label_button.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 "ui/base/cocoa/controls/blue_label_button.h"
 
 #include "base/mac/foundation_util.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/base/cocoa/scoped_cg_context_smooth_fonts.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 
 const CGFloat kCornerRadius = 2;
 
 const CGFloat kTopBottomTextPadding = 7;
 const CGFloat kLeftRightTextPadding = 15;
 const SkColor kTextShadowColor = SkColorSetRGB(0x53, 0x8c, 0xea);
 
 const SkColor kShadowColor = SkColorSetRGB(0xe9, 0xe9, 0xe9);
@@ skipping 66 matching lines @@
   textSize.width += 2 * kLeftRightTextPadding;
   return textSize;
 }
 
 - (NSRect)drawTitle:(NSAttributedString*)title
           withFrame:(NSRect)frame
              inView:(NSView*)controlView {
   // Fuzz factor to adjust for the drop shadow. Based on visual inspection.
   frame.origin.y -= 1;
 
-  // Ensure LCD font smoothing is enabled when layer backed.
-  // This is safe to do because we know we are drawing on an opaque background.
-  gfx::ScopedNSGraphicsContextSaveGState scopedGState;
-  NSGraphicsContext* context = [NSGraphicsContext currentContext];
-  CGContextRef cgContext = static_cast<CGContextRef>([context graphicsPort]);
-  CGContextSetShouldSmoothFonts(cgContext, true);
-
+  ui::ScopedCGContextSmoothFonts fontSmoothing;
   NSAttributedString* attributedTitle =
       [[self class] generateAttributedString:[self title]];
   [attributedTitle drawInRect:frame];
   return frame;
 }
 
 - (void)drawBezelWithFrame:(NSRect)frame
                     inView:(NSView*)controlView {
   NSColor* centerColor;
   NSColor* innerColor;
@@ skipping 34 matching lines @@
   [[NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 1, 1)
                                    xRadius:kCornerRadius
                                    yRadius:kCornerRadius] fill];
   [centerColor set];
   [[NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 2, 2)
                                    xRadius:kCornerRadius
                                    yRadius:kCornerRadius] fill];
 }
 
 @end