[Material][Mac] Replace hard-coded default favicon with .icon file

chrome/browser/ui/cocoa/tab_contents/favicon_util_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 "chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #include "components/favicon/content/content_favicon_driver.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image_skia_util_mac.h"
+#include "ui/gfx/paint_vector_icon.h"
+#include "ui/gfx/vector_icons_public.h"
 #include "ui/resources/grit/ui_resources.h"
 
 namespace {
 
 const CGFloat kVectorIconSize = 16;
 
 }  // namespace
 
-// A temporary class that draws the default favicon using vector commands.
-// This class will be removed once a more general solution that works for all
-// platforms is developed.
-@interface DefaultFaviconImageRep : NSCustomImageRep
-@property(retain, nonatomic) NSColor* strokeColor;
-
-+ (NSImage*)imageForColor:(SkColor)strokeColor;
-
-// NSCustomImageRep delegate method that performs the drawing.
-+ (void)drawDefaultFavicon:(DefaultFaviconImageRep*)imageRep;
-
-@end
-
-@implementation DefaultFaviconImageRep
-
-@synthesize strokeColor = strokeColor_;
-
-- (void)dealloc {
-  [strokeColor_ release];
-  [super dealloc];
-}
-
-+ (NSImage*)imageForColor:(SkColor)strokeColor {
-  base::scoped_nsobject<DefaultFaviconImageRep> imageRep(
-      [[DefaultFaviconImageRep alloc]
-          initWithDrawSelector:@selector(drawDefaultFavicon:)
-                      delegate:[DefaultFaviconImageRep class]]);
-  [imageRep setStrokeColor:skia::SkColorToSRGBNSColor(strokeColor)];
-
-  // Create the image from the image rep.
-  const NSSize imageSize = NSMakeSize(kVectorIconSize, kVectorIconSize);
-  NSImage* faviconImage =
-      [[[NSImage alloc] initWithSize:imageSize] autorelease];
-  [faviconImage setCacheMode:NSImageCacheAlways];
-  [faviconImage addRepresentation:imageRep];
-
-  [imageRep setSize:imageSize];
-
-  return faviconImage;
-}
-
-+ (void)drawDefaultFavicon:(DefaultFaviconImageRep*)imageRep {
-  // Translate by 1/2pt to ensure crisp lines.
-  CGContextRef context = static_cast<CGContextRef>(
-      [[NSGraphicsContext currentContext] graphicsPort]);
-  CGContextTranslateCTM(context, 0.5, 0.5);
-
-  NSBezierPath* iconPath = [NSBezierPath bezierPath];
-
-  // Create the horizontal and vertical parts of the shape.
-  [iconPath moveToPoint:NSMakePoint(3, 1)];
-  [iconPath relativeLineToPoint:NSMakePoint(0, 13)];
-  [iconPath relativeLineToPoint:NSMakePoint(5, 0)];
-  [iconPath relativeLineToPoint:NSMakePoint(0, -4)];
-  [iconPath relativeLineToPoint:NSMakePoint(4, 0)];
-  [iconPath relativeLineToPoint:NSMakePoint(0, -9)];
-  [iconPath closePath];
-
-  // Add the diagonal line.
-  [iconPath moveToPoint:NSMakePoint(8, 14)];
-  [iconPath relativeLineToPoint:NSMakePoint(4, -4)];
-
-  // Draw it in the desired color.
-  [[imageRep strokeColor] set];
-  [iconPath stroke];
-}
-
-@end
-
 namespace mac {
 
 NSImage* FaviconForWebContents(content::WebContents* contents, SkColor color) {
   favicon::FaviconDriver* favicon_driver =
       contents ? favicon::ContentFaviconDriver::FromWebContents(contents)
                : nullptr;
   if (favicon_driver && favicon_driver->FaviconIsValid()) {
     NSImage* image = favicon_driver->GetFavicon().AsNSImage();
     // The |image| could be nil if the bitmap is null. In that case, fallback
     // to the default image.
     if (image) {
       return image;
     }
   }
 
-  if (ui::MaterialDesignController::IsModeMaterial())
-    return [DefaultFaviconImageRep imageForColor:color];
+  if (ui::MaterialDesignController::IsModeMaterial()) {
+    return NSImageFromImageSkia(gfx::CreateVectorIcon(
+        gfx::VectorIconId::DEFAULT_FAVICON, kVectorIconSize, color));
+  }
 
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   return rb.GetNativeImageNamed(IDR_DEFAULT_FAVICON).ToNSImage();
 }
 
 }  // namespace mac