Optionally clear PlatformCanvas instances.

skia/ext/platform_canvas_win.cc

 // 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 <windows.h>
 #include <psapi.h>
 
 #include "base/debug/trace_event.h"
 #include "skia/ext/bitmap_platform_device_win.h"
 #include "skia/ext/platform_canvas.h"
@@ skipping 55 matching lines @@
 // unlike its cousin CrashForBitmapAllocationFailure() it tries to detect if
 // the issue was a non-valid shared bitmap handle.
 void CrashIfInvalidSection(HANDLE shared_section) {
   DWORD handle_info = 0;
   COF(8, ::GetHandleInformation(shared_section, &handle_info) == TRUE);
 }
 
 // Restore the optimization options.
 #pragma optimize("", on)
 
-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, NULL);
+  initialize(width, height, flags, NULL);
 }
 
 PlatformCanvas::PlatformCanvas(int width,
                                int height,
-                               bool is_opaque,
+                               int flags,
                                HANDLE shared_section) {
   TRACE_EVENT2("skia", "PlatformCanvas::PlatformCanvas",
                "width", width, "height", height);
-  initialize(width, height, is_opaque, shared_section);
+  initialize(width, height, flags, shared_section);
 }
 
 PlatformCanvas::~PlatformCanvas() {
 }
 
 bool PlatformCanvas::initialize(int width,
-                               int height,
-                               bool is_opaque,
-                               HANDLE shared_section) {
+                                int height,
+                                int flags,
+                                HANDLE shared_section) {
   if (initializeWithDevice(BitmapPlatformDevice::create(width,
                                                         height,
-                                                        is_opaque,
+                                                        flags,
                                                         shared_section)))
     return true;
   // Investigate we failed. If we know the reason, crash in a specific place.
   unsigned int error = GetLastError();
   if (shared_section)
     CrashIfInvalidSection(shared_section);
   CrashForBitmapAllocationFailure(width, height, error);
   return false;
 }
 
 }  // namespace skia