don't need native-drawing-context for CanvasSkiaPaint

BUG=675977

Review-Url: https://codereview.chromium.org/2612023003
Cr-Commit-Position: refs/heads/master@{#441392}

ui/gfx/canvas_paint_mac.mm

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/mac/mac_util.h"
+#include "third_party/skia/include/utils/mac/SkCGUtils.h"
 #include "ui/gfx/canvas_paint_mac.h"
 #include "ui/gfx/geometry/size.h"
 
@@ -25,8 +27,14 @@ CanvasSkiaPaint::~CanvasSkiaPaint() {
     canvas->restoreToCount(1);
 
     // Blit the dirty rect to the current context.
-    CGImageRef image =
-        CGBitmapContextCreateImage(skia::GetNativeDrawingContext(canvas));
+    SkPixmap pixmap;
+    bool success = canvas->peekPixels(&pixmap);
+    DCHECK(success);
+    SkBitmap bitmap;
+    success = bitmap.installPixels(pixmap);
+    DCHECK(success);
+    CGImageRef image = SkCreateCGImageRefWithColorspace(
+        bitmap, base::mac::GetSystemColorSpace());
     CGRect dest_rect = NSRectToCGRect(rectangle_);
 
     CGContextRef destination_context =