Optionally clear PlatformCanvas instances.

skia/ext/platform_canvas_mac.cc

 // Copyright (c) 2011 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 "skia/ext/platform_canvas.h"
 
 #include "base/debug/trace_event.h"
 #include "skia/ext/bitmap_platform_device.h"
 #include "third_party/skia/include/core/SkTypes.h"
 
 namespace skia {
 
-PlatformCanvas::PlatformCanvas(int width, int height, bool is_opaque) {
+PlatformCanvas::PlatformCanvas(int width, int height, int flags) {
   TRACE_EVENT2("skia", "PlatformCanvas::PlatformCanvas",
                "width", width, "height", height);
-  initialize(width, height, is_opaque);
+  initialize(width, height, flags);
 }
 
 PlatformCanvas::PlatformCanvas(int width,
                                int height,
-                               bool is_opaque,
+                               int flags,
                                CGContextRef context) {
   TRACE_EVENT2("skia", "PlatformCanvas::PlatformCanvas",
                "width", width, "height", height);
-  initialize(context, width, height, is_opaque);
+  initialize(context, width, height, flags);
 }
 
 PlatformCanvas::PlatformCanvas(int width,
                                int height,
-                               bool is_opaque,
+                               int flags,
                                uint8_t* data) {
   TRACE_EVENT2("skia", "PlatformCanvas::PlatformCanvas",
                "width", width, "height", height);
-  initialize(width, height, is_opaque, data);
+  initialize(width, height, flags, data);
 }
 
 PlatformCanvas::~PlatformCanvas() {
 }
 
 bool PlatformCanvas::initialize(int width,
                                 int height,
-                                bool is_opaque,
+                                int flags,
                                 uint8_t* data) {
   return initializeWithDevice(BitmapPlatformDevice::CreateWithData(
-      data, width, height, is_opaque));
+      data, width, height, flags));
 }
 
 bool PlatformCanvas::initialize(CGContextRef context,
                                 int width,
                                 int height,
-                                bool is_opaque) {
+                                int flags) {
   return initializeWithDevice(BitmapPlatformDevice::Create(
-      context, width, height, is_opaque));
+      context, width, height, flags));
 }
 
 }  // namespace skia