Refactor AcceleratedStaticBitmapImage

third_party/WebKit/Source/platform/graphics/WebGraphicsContext3DProviderWrapper.h

+// Copyright 2016 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.
+
+#ifndef WebGraphicsContext3DProviderWrapper_h
+#define WebGraphicsContext3DProviderWrapper_h
+
+#include "public/platform/WebGraphicsContext3DProvider.h"
+#include "wtf/WeakPtr.h"
+
+namespace blink {
+
+class PLATFORM_EXPORT WebGraphicsContext3DProviderWrapper {
+ public:
+  WebGraphicsContext3DProviderWrapper(WebGraphicsContext3DProvider* provider)
+      : m_contextProvider(provider), m_weakPtrFactory(this) {}
+  WeakPtr<WebGraphicsContext3DProviderWrapper> createWeakPtr() {
+    return m_weakPtrFactory.createWeakPtr();
+  }
+  WebGraphicsContext3DProvider* contextProvider() { return m_contextProvider; }
+
+ private:
+  WebGraphicsContext3DProvider* m_contextProvider;

[Justin Novosad, 2016/11/08 19:38:54]

This is your problem: this is supposed to be a unique_ptr.  The wrapper needs to
own the context provider, and DrawingBuffer owns the wrapper.

[xidachen, 2016/11/08 20:30:58]

Yeah, that makes perfect sense. After I made this change, things are working
well.

+  WeakPtrFactory<WebGraphicsContext3DProviderWrapper> m_weakPtrFactory;
+};
+
+}  // namespace blink
+
+#endif  // WebGraphicsContext3DProviderWrapper_h