Rework gfx::Font by moving platform-specific code into inner classes....

gfx/canvas_skia_mac.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "gfx/canvas_skia.h"
 
 #include "base/scoped_cftyperef.h"
 #include "base/sys_string_conversions.h"
@@ skipping 10 matching lines @@
 CanvasSkia::CanvasSkia() : skia::PlatformCanvas() {
 }
 
 CanvasSkia::~CanvasSkia() {
 }
 
 // static
 void CanvasSkia::SizeStringInt(const std::wstring& text,
                                const gfx::Font& font,
                                int *width, int *height, int flags) {
-  NSFont* native_font = font.nativeFont();
+  NSFont* native_font = font.GetNativeFont();
   NSString* ns_string = base::SysWideToNSString(text);
   NSDictionary* attributes =
       [NSDictionary dictionaryWithObject:native_font
                                   forKey:NSFontAttributeName];
   NSSize string_size = [ns_string sizeWithAttributes:attributes];
   *width = string_size.width;
-  *height = font.height();
+  *height = font.GetHeight();
 }
 
 void CanvasSkia::DrawStringInt(const std::wstring& text, const gfx::Font& font,
                                const SkColor& color, int x, int y, int w, int h,
                                int flags) {
   if (!IntersectsClipRectInt(x, y, w, h))
     return;
 
   CGContextRef context = beginPlatformPaint();
   CGContextSaveGState(context);
 
   NSColor* ns_color = [NSColor colorWithDeviceRed:SkColorGetR(color) / 255.0
                                             green:SkColorGetG(color) / 255.0
                                              blue:SkColorGetB(color) / 255.0
                                             alpha:SkColorGetA(color) / 255.0];
   NSMutableParagraphStyle *ns_style =
       [[[NSParagraphStyle alloc] init] autorelease];
   if (flags & TEXT_ALIGN_CENTER)
     [ns_style setAlignment:NSCenterTextAlignment];
   // TODO(awalker): Implement the rest of the Canvas text flags
 
   NSDictionary* attributes =
       [NSDictionary dictionaryWithObjectsAndKeys:
-          font.nativeFont(), NSFontAttributeName,
+          font.GetNativeFont(), NSFontAttributeName,
           ns_color, NSForegroundColorAttributeName,
           ns_style, NSParagraphStyleAttributeName,
           nil];
 
   NSAttributedString* ns_string =
       [[[NSAttributedString alloc] initWithString:base::SysWideToNSString(text)
                                         attributes:attributes] autorelease];
   scoped_cftyperef<CTFramesetterRef> framesetter(
       CTFramesetterCreateWithAttributedString(reinterpret_cast<CFAttributedStringRef>(ns_string)));
 
   CGRect text_bounds = CGRectMake(x, y, w, h);
   CGMutablePathRef path = CGPathCreateMutable();
   CGPathAddRect(path, NULL, text_bounds);
 
   scoped_cftyperef<CTFrameRef> frame(
       CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), path, NULL));
   CTFrameDraw(frame, context);
   CGContextRestoreGState(context);
   endPlatformPaint();
 }
 
 }  // namespace gfx