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diff --git a/app/gfx/font_mac.mm b/app/gfx/font_mac.mm
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+++ b/app/gfx/font_mac.mm
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+// Copyright (c) 2009 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 "app/gfx/font.h"
+
+#include <Cocoa/Cocoa.h>
+
+#include "base/logging.h"
+#include "base/sys_string_conversions.h"
+
+namespace gfx {
+
+// static
+Font Font::CreateFont(const std::wstring& font_name, int font_size) {
+  return Font(font_name, font_size, NORMAL);
+}
+
+Font::Font(const std::wstring& font_name, int font_size, int style)
+    : font_name_(font_name),
+      font_size_(font_size),
+      style_(style) {
+  calculateMetrics();
+}
+
+Font::Font()
+    : font_size_([NSFont systemFontSize]),
+      style_(NORMAL) {
+  NSFont* system_font = [NSFont systemFontOfSize:font_size_];
+  font_name_ = base::SysNSStringToWide([system_font fontName]);
+  calculateMetrics();
+}
+
+void Font::calculateMetrics() {
+  NSFont* font = nativeFont();
+  height_ = [font xHeight];
+  ascent_ = [font ascender];
+  avg_width_ = [font boundingRectForGlyph:[font glyphWithName:@"x"]].size.width;
+}
+
+Font Font::DeriveFont(int size_delta, int style) const {
+  return Font(font_name_, font_size_ + size_delta, style);
+}
+
+int Font::height() const {
+  return height_;
+}
+
+int Font::baseline() const {
+  return ascent_;
+}
+
+int Font::ave_char_width() const {
+  return avg_width_;
+}
+
+int Font::GetStringWidth(const std::wstring& text) const {
+  NSFont* font = nativeFont();
+  NSString* ns_string = base::SysWideToNSString(text);
+  NSDictionary* attributes =
+      [NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName];
+  NSSize string_size = [ns_string sizeWithAttributes:attributes];
+  return string_size.width;
+}
+
+int Font::GetExpectedTextWidth(int length) const {
+  return length * avg_width_;
+}
+
+int Font::style() const {
+  return style_;
+}
+
+std::wstring Font::FontName() {
+  return font_name_;
+}
+
+int Font::FontSize() {
+  return font_size_;
+}
+
+NativeFont Font::nativeFont() const {
+  // TODO(pinkerton): apply |style_| to font.
+  // We could cache this, but then we'd have to conditionally change the
+  // dtor just for MacOS. Not sure if we want to/need to do that.
+  return [NSFont fontWithName:base::SysWideToNSString(font_name_)
+                         size:font_size_];
+}
+
+}  // namespace gfx