MacViews: Fix vertical alignment of text rendering.

ui/gfx/platform_font_mac.mm

 // Copyright (c) 2012 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 "ui/gfx/platform_font_mac.h"
 
 #include <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 148 matching lines @@
     // an actual font. Don't waste time working out metrics.
     height_ = 0;
     ascent_ = 0;
     cap_height_ = 0;
     average_width_ = 0;
     return;
   }
 
   base::scoped_nsobject<NSLayoutManager> layout_manager(
       [[NSLayoutManager alloc] init]);
-  height_ = [layout_manager defaultLineHeightForFont:font];
-  ascent_ = [font ascender];
-  cap_height_ = [font capHeight];
+  height_ = SkScalarCeilToInt([layout_manager defaultLineHeightForFont:font]);
+  ascent_ = SkScalarCeilToInt([font ascender]);
+  cap_height_ = SkScalarCeilToInt([font capHeight]);
   average_width_ =
       NSWidth([font boundingRectForGlyph:[font glyphWithName:@"x"]]);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // PlatformFont, public:
 
 // static
 PlatformFont* PlatformFont::CreateDefault() {
   return new PlatformFontMac;
 }
 
 // static
 PlatformFont* PlatformFont::CreateFromNativeFont(NativeFont native_font) {
   return new PlatformFontMac(native_font);
 }
 
 // static
 PlatformFont* PlatformFont::CreateFromNameAndSize(const std::string& font_name,
                                                   int font_size) {
   return new PlatformFontMac(font_name, font_size);
 }
 
 }  // namespace gfx