Correct the OffscreenCanvas.getContext API

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp

 // Copyright 2015 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 "modules/webgl/WebGL2RenderingContextBase.h"
 
 #include "bindings/modules/v8/WebGLAny.h"
 #include "core/dom/DOMException.h"
 #include "core/frame/ImageBitmap.h"
 #include "core/html/HTMLCanvasElement.h"
@@ skipping 229 matching lines @@
       m_boundUniformBuffer(this, nullptr),
       m_currentBooleanOcclusionQuery(this, nullptr),
       m_currentTransformFeedbackPrimitivesWrittenQuery(this, nullptr),
       m_currentElapsedQuery(this, nullptr) {
   m_supportedInternalFormatsStorage.insert(
       kSupportedInternalFormatsStorage,
       kSupportedInternalFormatsStorage +
           WTF_ARRAY_LENGTH(kSupportedInternalFormatsStorage));
 }
 
+WebGL2RenderingContextBase::WebGL2RenderingContextBase(
+    OffscreenCanvas* passedOffscreenCanvas,
+    std::unique_ptr<WebGraphicsContext3DProvider> contextProvider,
+    const CanvasContextCreationAttributes& requestedAttributes)
+    : WebGLRenderingContextBase(passedOffscreenCanvas,
+                                std::move(contextProvider),
+                                requestedAttributes,
+                                2),
+      m_readFramebufferBinding(this, nullptr),
+      m_transformFeedbackBinding(this, nullptr),
+      m_boundCopyReadBuffer(this, nullptr),
+      m_boundCopyWriteBuffer(this, nullptr),
+      m_boundPixelPackBuffer(this, nullptr),
+      m_boundPixelUnpackBuffer(this, nullptr),
+      m_boundTransformFeedbackBuffer(this, nullptr),
+      m_boundUniformBuffer(this, nullptr),
+      m_currentBooleanOcclusionQuery(this, nullptr),
+      m_currentTransformFeedbackPrimitivesWrittenQuery(this, nullptr),
+      m_currentElapsedQuery(this, nullptr) {
+  m_supportedInternalFormatsStorage.insert(
+      kSupportedInternalFormatsStorage,
+      kSupportedInternalFormatsStorage +
+          WTF_ARRAY_LENGTH(kSupportedInternalFormatsStorage));
+}
+
 WebGL2RenderingContextBase::~WebGL2RenderingContextBase() {
   m_readFramebufferBinding = nullptr;
 
   m_boundCopyReadBuffer = nullptr;
   m_boundCopyWriteBuffer = nullptr;
   m_boundPixelPackBuffer = nullptr;
   m_boundPixelUnpackBuffer = nullptr;
   m_boundTransformFeedbackBuffer = nullptr;
   m_boundUniformBuffer = nullptr;
 
@@ skipping 4680 matching lines @@
 
 void WebGL2RenderingContextBase::
     DrawingBufferClientRestorePixelUnpackBufferBinding() {
   if (!contextGL())
     return;
   contextGL()->BindBuffer(GL_PIXEL_UNPACK_BUFFER,
                           objectOrZero(m_boundPixelUnpackBuffer.get()));
 }
 
 }  // namespace blink