Update from https://crrev.com/309415

gpu/blink/webgraphicscontext3d_impl.h

Index: gpu/blink/webgraphicscontext3d_impl.h
diff --git a/gpu/blink/webgraphicscontext3d_impl.h b/gpu/blink/webgraphicscontext3d_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..41a6d89411c29764b605cf7c8eb8a4bb24ed289b
--- /dev/null
+++ b/gpu/blink/webgraphicscontext3d_impl.h
@@ -0,0 +1,612 @@
+// 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.
+
+#ifndef GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_
+#define GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "gpu/blink/gpu_blink_export.h"
+#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
+#include "third_party/WebKit/public/platform/WebString.h"
+
+namespace gpu {
+
+namespace gles2 {
+class GLES2Interface;
+class GLES2ImplementationErrorMessageCallback;
+struct ContextCreationAttribHelper;
+}
+}
+
+using blink::WebGLId;
+
+using blink::WGC3Dbyte;
+using blink::WGC3Dchar;
+using blink::WGC3Denum;
+using blink::WGC3Dboolean;
+using blink::WGC3Dbitfield;
+using blink::WGC3Dint;
+using blink::WGC3Dsizei;
+using blink::WGC3Duint;
+using blink::WGC3Dfloat;
+using blink::WGC3Dclampf;
+using blink::WGC3Dintptr;
+using blink::WGC3Dsizeiptr;
+
+namespace gpu_blink {
+
+class WebGraphicsContext3DErrorMessageCallback;
+
+class GPU_BLINK_EXPORT WebGraphicsContext3DImpl
+    : public NON_EXPORTED_BASE(blink::WebGraphicsContext3D) {
+ public:
+  virtual ~WebGraphicsContext3DImpl();
+
+  //----------------------------------------------------------------------
+  // WebGraphicsContext3D methods
+
+  virtual uint32_t lastFlushID();
+
+  virtual unsigned int insertSyncPoint();
+  virtual void waitSyncPoint(unsigned int sync_point);
+
+  virtual void loseContextCHROMIUM(WGC3Denum current, WGC3Denum other);
+
+  virtual void reshapeWithScaleFactor(
+      int width, int height, float scale_factor);
+
+  virtual void prepareTexture();
+  virtual void postSubBufferCHROMIUM(int x, int y, int width, int height);
+
+  virtual void activeTexture(WGC3Denum texture);
+  virtual void attachShader(WebGLId program, WebGLId shader);
+  virtual void bindAttribLocation(WebGLId program, WGC3Duint index,
+                                  const WGC3Dchar* name);
+  virtual void bindBuffer(WGC3Denum target, WebGLId buffer);
+  virtual void bindFramebuffer(WGC3Denum target, WebGLId framebuffer);
+  virtual void bindRenderbuffer(WGC3Denum target, WebGLId renderbuffer);
+  virtual void bindTexture(WGC3Denum target, WebGLId texture);
+  virtual void blendColor(WGC3Dclampf red, WGC3Dclampf green,
+                          WGC3Dclampf blue, WGC3Dclampf alpha);
+  virtual void blendEquation(WGC3Denum mode);
+  virtual void blendEquationSeparate(WGC3Denum modeRGB,
+                                     WGC3Denum modeAlpha);
+  virtual void blendFunc(WGC3Denum sfactor, WGC3Denum dfactor);
+  virtual void blendFuncSeparate(WGC3Denum srcRGB,
+                                 WGC3Denum dstRGB,
+                                 WGC3Denum srcAlpha,
+                                 WGC3Denum dstAlpha);
+
+  virtual void bufferData(WGC3Denum target, WGC3Dsizeiptr size,
+                          const void* data, WGC3Denum usage);
+  virtual void bufferSubData(WGC3Denum target, WGC3Dintptr offset,
+                             WGC3Dsizeiptr size, const void* data);
+
+  virtual WGC3Denum checkFramebufferStatus(WGC3Denum target);
+  virtual void clear(WGC3Dbitfield mask);
+  virtual void clearColor(WGC3Dclampf red, WGC3Dclampf green,
+                          WGC3Dclampf blue, WGC3Dclampf alpha);
+  virtual void clearDepth(WGC3Dclampf depth);
+  virtual void clearStencil(WGC3Dint s);
+  virtual void colorMask(WGC3Dboolean red, WGC3Dboolean green,
+                         WGC3Dboolean blue, WGC3Dboolean alpha);
+  virtual void compileShader(WebGLId shader);
+
+  virtual void compressedTexImage2D(WGC3Denum target,
+                                    WGC3Dint level,
+                                    WGC3Denum internalformat,
+                                    WGC3Dsizei width,
+                                    WGC3Dsizei height,
+                                    WGC3Dint border,
+                                    WGC3Dsizei imageSize,
+                                    const void* data);
+  virtual void compressedTexSubImage2D(WGC3Denum target,
+                                       WGC3Dint level,
+                                       WGC3Dint xoffset,
+                                       WGC3Dint yoffset,
+                                       WGC3Dsizei width,
+                                       WGC3Dsizei height,
+                                       WGC3Denum format,
+                                       WGC3Dsizei imageSize,
+                                       const void* data);
+  virtual void copyTexImage2D(WGC3Denum target,
+                              WGC3Dint level,
+                              WGC3Denum internalformat,
+                              WGC3Dint x,
+                              WGC3Dint y,
+                              WGC3Dsizei width,
+                              WGC3Dsizei height,
+                              WGC3Dint border);
+  virtual void copyTexSubImage2D(WGC3Denum target,
+                                 WGC3Dint level,
+                                 WGC3Dint xoffset,
+                                 WGC3Dint yoffset,
+                                 WGC3Dint x,
+                                 WGC3Dint y,
+                                 WGC3Dsizei width,
+                                 WGC3Dsizei height);
+  virtual void cullFace(WGC3Denum mode);
+  virtual void depthFunc(WGC3Denum func);
+  virtual void depthMask(WGC3Dboolean flag);
+  virtual void depthRange(WGC3Dclampf zNear, WGC3Dclampf zFar);
+  virtual void detachShader(WebGLId program, WebGLId shader);
+  virtual void disable(WGC3Denum cap);
+  virtual void disableVertexAttribArray(WGC3Duint index);
+  virtual void drawArrays(WGC3Denum mode, WGC3Dint first, WGC3Dsizei count);
+  virtual void drawElements(WGC3Denum mode,
+                            WGC3Dsizei count,
+                            WGC3Denum type,
+                            WGC3Dintptr offset);
+
+  virtual void enable(WGC3Denum cap);
+  virtual void enableVertexAttribArray(WGC3Duint index);
+  virtual void finish();
+  virtual void flush();
+  virtual void framebufferRenderbuffer(WGC3Denum target,
+                                       WGC3Denum attachment,
+                                       WGC3Denum renderbuffertarget,
+                                       WebGLId renderbuffer);
+  virtual void framebufferTexture2D(WGC3Denum target,
+                                    WGC3Denum attachment,
+                                    WGC3Denum textarget,
+                                    WebGLId texture,
+                                    WGC3Dint level);
+  virtual void frontFace(WGC3Denum mode);
+  virtual void generateMipmap(WGC3Denum target);
+
+  virtual bool getActiveAttrib(WebGLId program,
+                               WGC3Duint index,
+                               ActiveInfo&);
+  virtual bool getActiveUniform(WebGLId program,
+                                WGC3Duint index,
+                                ActiveInfo&);
+
+  virtual void getAttachedShaders(WebGLId program,
+                                  WGC3Dsizei maxCount,
+                                  WGC3Dsizei* count,
+                                  WebGLId* shaders);
+
+  virtual WGC3Dint  getAttribLocation(WebGLId program, const WGC3Dchar* name);
+
+  virtual void getBooleanv(WGC3Denum pname, WGC3Dboolean* value);
+
+  virtual void getBufferParameteriv(WGC3Denum target,
+                                    WGC3Denum pname,
+                                    WGC3Dint* value);
+
+  virtual WGC3Denum getError();
+
+  virtual void getFloatv(WGC3Denum pname, WGC3Dfloat* value);
+
+  virtual void getFramebufferAttachmentParameteriv(WGC3Denum target,
+                                                   WGC3Denum attachment,
+                                                   WGC3Denum pname,
+                                                   WGC3Dint* value);
+
+  virtual void getIntegerv(WGC3Denum pname, WGC3Dint* value);
+
+  virtual void getProgramiv(WebGLId program, WGC3Denum pname, WGC3Dint* value);
+
+  virtual blink::WebString getProgramInfoLog(WebGLId program);
+
+  virtual void getRenderbufferParameteriv(WGC3Denum target,
+                                          WGC3Denum pname,
+                                          WGC3Dint* value);
+
+  virtual void getShaderiv(WebGLId shader, WGC3Denum pname, WGC3Dint* value);
+
+  virtual blink::WebString getShaderInfoLog(WebGLId shader);
+
+  virtual void getShaderPrecisionFormat(WGC3Denum shadertype,
+                                        WGC3Denum precisiontype,
+                                        WGC3Dint* range,
+                                        WGC3Dint* precision);
+
+  virtual blink::WebString getShaderSource(WebGLId shader);
+  virtual blink::WebString getString(WGC3Denum name);
+
+  virtual void getTexParameterfv(WGC3Denum target,
+                                 WGC3Denum pname,
+                                 WGC3Dfloat* value);
+  virtual void getTexParameteriv(WGC3Denum target,
+                                 WGC3Denum pname,
+                                 WGC3Dint* value);
+
+  virtual void getUniformfv(WebGLId program,
+                            WGC3Dint location,
+                            WGC3Dfloat* value);
+  virtual void getUniformiv(WebGLId program,
+                            WGC3Dint location,
+                            WGC3Dint* value);
+
+  virtual WGC3Dint getUniformLocation(WebGLId program, const WGC3Dchar* name);
+
+  virtual void getVertexAttribfv(WGC3Duint index, WGC3Denum pname,
+                                 WGC3Dfloat* value);
+  virtual void getVertexAttribiv(WGC3Duint index, WGC3Denum pname,
+                                 WGC3Dint* value);
+
+  virtual WGC3Dsizeiptr getVertexAttribOffset(WGC3Duint index, WGC3Denum pname);
+
+  virtual void hint(WGC3Denum target, WGC3Denum mode);
+  virtual WGC3Dboolean isBuffer(WebGLId buffer);
+  virtual WGC3Dboolean isEnabled(WGC3Denum cap);
+  virtual WGC3Dboolean isFramebuffer(WebGLId framebuffer);
+  virtual WGC3Dboolean isProgram(WebGLId program);
+  virtual WGC3Dboolean isRenderbuffer(WebGLId renderbuffer);
+  virtual WGC3Dboolean isShader(WebGLId shader);
+  virtual WGC3Dboolean isTexture(WebGLId texture);
+  virtual void lineWidth(WGC3Dfloat);
+  virtual void linkProgram(WebGLId program);
+  virtual void pixelStorei(WGC3Denum pname, WGC3Dint param);
+  virtual void polygonOffset(WGC3Dfloat factor, WGC3Dfloat units);
+
+  virtual void readPixels(WGC3Dint x,
+                          WGC3Dint y,
+                          WGC3Dsizei width,
+                          WGC3Dsizei height,
+                          WGC3Denum format,
+                          WGC3Denum type,
+                          void* pixels);
+
+  virtual void releaseShaderCompiler();
+  virtual void renderbufferStorage(WGC3Denum target,
+                                   WGC3Denum internalformat,
+                                   WGC3Dsizei width,
+                                   WGC3Dsizei height);
+  virtual void sampleCoverage(WGC3Dfloat value, WGC3Dboolean invert);
+  virtual void scissor(WGC3Dint x, WGC3Dint y,
+                       WGC3Dsizei width, WGC3Dsizei height);
+  virtual void shaderSource(WebGLId shader, const WGC3Dchar* string);
+  virtual void stencilFunc(WGC3Denum func, WGC3Dint ref, WGC3Duint mask);
+  virtual void stencilFuncSeparate(WGC3Denum face,
+                                   WGC3Denum func,
+                                   WGC3Dint ref,
+                                   WGC3Duint mask);
+  virtual void stencilMask(WGC3Duint mask);
+  virtual void stencilMaskSeparate(WGC3Denum face, WGC3Duint mask);
+  virtual void stencilOp(WGC3Denum fail,
+                         WGC3Denum zfail,
+                         WGC3Denum zpass);
+  virtual void stencilOpSeparate(WGC3Denum face,
+                                 WGC3Denum fail,
+                                 WGC3Denum zfail,
+                                 WGC3Denum zpass);
+
+  virtual void texImage2D(WGC3Denum target,
+                          WGC3Dint level,
+                          WGC3Denum internalformat,
+                          WGC3Dsizei width,
+                          WGC3Dsizei height,
+                          WGC3Dint border,
+                          WGC3Denum format,
+                          WGC3Denum type,
+                          const void* pixels);
+
+  virtual void texParameterf(WGC3Denum target,
+                             WGC3Denum pname,
+                             WGC3Dfloat param);
+  virtual void texParameteri(WGC3Denum target,
+                             WGC3Denum pname,
+                             WGC3Dint param);
+
+  virtual void texSubImage2D(WGC3Denum target,
+                             WGC3Dint level,
+                             WGC3Dint xoffset,
+                             WGC3Dint yoffset,
+                             WGC3Dsizei width,
+                             WGC3Dsizei height,
+                             WGC3Denum format,
+                             WGC3Denum type,
+                             const void* pixels);
+
+  virtual void uniform1f(WGC3Dint location, WGC3Dfloat x);
+  virtual void uniform1fv(WGC3Dint location,
+                          WGC3Dsizei count, const WGC3Dfloat* v);
+  virtual void uniform1i(WGC3Dint location, WGC3Dint x);
+  virtual void uniform1iv(WGC3Dint location,
+                          WGC3Dsizei count, const WGC3Dint* v);
+  virtual void uniform2f(WGC3Dint location, WGC3Dfloat x, WGC3Dfloat y);
+  virtual void uniform2fv(WGC3Dint location,
+                          WGC3Dsizei count, const WGC3Dfloat* v);
+  virtual void uniform2i(WGC3Dint location, WGC3Dint x, WGC3Dint y);
+  virtual void uniform2iv(WGC3Dint location,
+                          WGC3Dsizei count, const WGC3Dint* v);
+  virtual void uniform3f(WGC3Dint location,
+                         WGC3Dfloat x, WGC3Dfloat y, WGC3Dfloat z);
+  virtual void uniform3fv(WGC3Dint location,
+                          WGC3Dsizei count, const WGC3Dfloat* v);
+  virtual void uniform3i(WGC3Dint location,
+                         WGC3Dint x, WGC3Dint y, WGC3Dint z);
+  virtual void uniform3iv(WGC3Dint location,
+                          WGC3Dsizei count, const WGC3Dint* v);
+  virtual void uniform4f(WGC3Dint location,
+                         WGC3Dfloat x, WGC3Dfloat y,
+                         WGC3Dfloat z, WGC3Dfloat w);
+  virtual void uniform4fv(WGC3Dint location,
+                          WGC3Dsizei count, const WGC3Dfloat* v);
+  virtual void uniform4i(WGC3Dint location,
+                         WGC3Dint x, WGC3Dint y, WGC3Dint z, WGC3Dint w);
+  virtual void uniform4iv(WGC3Dint location,
+                          WGC3Dsizei count, const WGC3Dint* v);
+  virtual void uniformMatrix2fv(WGC3Dint location,
+                                WGC3Dsizei count,
+                                WGC3Dboolean transpose,
+                                const WGC3Dfloat* value);
+  virtual void uniformMatrix3fv(WGC3Dint location,
+                                WGC3Dsizei count,
+                                WGC3Dboolean transpose,
+                                const WGC3Dfloat* value);
+  virtual void uniformMatrix4fv(WGC3Dint location,
+                                WGC3Dsizei count,
+                                WGC3Dboolean transpose,
+                                const WGC3Dfloat* value);
+
+  virtual void useProgram(WebGLId program);
+  virtual void validateProgram(WebGLId program);
+
+  virtual void vertexAttrib1f(WGC3Duint index, WGC3Dfloat x);
+  virtual void vertexAttrib1fv(WGC3Duint index, const WGC3Dfloat* values);
+  virtual void vertexAttrib2f(WGC3Duint index, WGC3Dfloat x, WGC3Dfloat y);
+  virtual void vertexAttrib2fv(WGC3Duint index, const WGC3Dfloat* values);
+  virtual void vertexAttrib3f(WGC3Duint index,
+                              WGC3Dfloat x, WGC3Dfloat y, WGC3Dfloat z);
+  virtual void vertexAttrib3fv(WGC3Duint index, const WGC3Dfloat* values);
+  virtual void vertexAttrib4f(WGC3Duint index,
+                              WGC3Dfloat x, WGC3Dfloat y,
+                              WGC3Dfloat z, WGC3Dfloat w);
+  virtual void vertexAttrib4fv(WGC3Duint index, const WGC3Dfloat* values);
+  virtual void vertexAttribPointer(WGC3Duint index,
+                                   WGC3Dint size,
+                                   WGC3Denum type,
+                                   WGC3Dboolean normalized,
+                                   WGC3Dsizei stride,
+                                   WGC3Dintptr offset);
+
+  virtual void viewport(WGC3Dint x, WGC3Dint y,
+                        WGC3Dsizei width, WGC3Dsizei height);
+
+  // Support for buffer creation and deletion
+  virtual void genBuffers(WGC3Dsizei count, WebGLId* ids);
+  virtual void genFramebuffers(WGC3Dsizei count, WebGLId* ids);
+  virtual void genRenderbuffers(WGC3Dsizei count, WebGLId* ids);
+  virtual void genTextures(WGC3Dsizei count, WebGLId* ids);
+
+  virtual void deleteBuffers(WGC3Dsizei count, WebGLId* ids);
+  virtual void deleteFramebuffers(WGC3Dsizei count, WebGLId* ids);
+  virtual void deleteRenderbuffers(WGC3Dsizei count, WebGLId* ids);
+  virtual void deleteTextures(WGC3Dsizei count, WebGLId* ids);
+
+  virtual WebGLId createBuffer();
+  virtual WebGLId createFramebuffer();
+  virtual WebGLId createRenderbuffer();
+  virtual WebGLId createTexture();
+
+  virtual void deleteBuffer(WebGLId);
+  virtual void deleteFramebuffer(WebGLId);
+  virtual void deleteRenderbuffer(WebGLId);
+  virtual void deleteTexture(WebGLId);
+
+  virtual WebGLId createProgram();
+  virtual WebGLId createShader(WGC3Denum);
+
+  virtual void deleteProgram(WebGLId);
+  virtual void deleteShader(WebGLId);
+
+  virtual void synthesizeGLError(WGC3Denum);
+
+  virtual void* mapBufferSubDataCHROMIUM(
+      WGC3Denum target, WGC3Dintptr offset,
+      WGC3Dsizeiptr size, WGC3Denum access);
+  virtual void unmapBufferSubDataCHROMIUM(const void*);
+  virtual void* mapTexSubImage2DCHROMIUM(
+      WGC3Denum target,
+      WGC3Dint level,
+      WGC3Dint xoffset,
+      WGC3Dint yoffset,
+      WGC3Dsizei width,
+      WGC3Dsizei height,
+      WGC3Denum format,
+      WGC3Denum type,
+      WGC3Denum access);
+  virtual void unmapTexSubImage2DCHROMIUM(const void*);
+
+  virtual void setVisibilityCHROMIUM(bool visible);
+
+  virtual void discardFramebufferEXT(WGC3Denum target,
+                                     WGC3Dsizei numAttachments,
+                                     const WGC3Denum* attachments);
+  virtual void copyTextureToParentTextureCHROMIUM(
+      WebGLId texture, WebGLId parentTexture);
+
+  virtual blink::WebString getRequestableExtensionsCHROMIUM();
+  virtual void requestExtensionCHROMIUM(const char*);
+
+  virtual void blitFramebufferCHROMIUM(
+      WGC3Dint srcX0, WGC3Dint srcY0, WGC3Dint srcX1, WGC3Dint srcY1,
+      WGC3Dint dstX0, WGC3Dint dstY0, WGC3Dint dstX1, WGC3Dint dstY1,
+      WGC3Dbitfield mask, WGC3Denum filter);
+  virtual void renderbufferStorageMultisampleCHROMIUM(
+      WGC3Denum target, WGC3Dsizei samples, WGC3Denum internalformat,
+      WGC3Dsizei width, WGC3Dsizei height);
+
+  virtual blink::WebString getTranslatedShaderSourceANGLE(WebGLId shader);
+
+  virtual void setContextLostCallback(
+      WebGraphicsContext3D::WebGraphicsContextLostCallback* callback);
+
+  virtual void setErrorMessageCallback(
+      WebGraphicsContext3D::WebGraphicsErrorMessageCallback* callback);
+
+  virtual void texImageIOSurface2DCHROMIUM(
+      WGC3Denum target, WGC3Dint width, WGC3Dint height,
+      WGC3Duint ioSurfaceId, WGC3Duint plane);
+
+  virtual void texStorage2DEXT(
+      WGC3Denum target, WGC3Dint levels, WGC3Duint internalformat,
+      WGC3Dint width, WGC3Dint height);
+
+  virtual WebGLId createQueryEXT();
+  virtual void deleteQueryEXT(WebGLId query);
+  virtual WGC3Dboolean isQueryEXT(WGC3Duint query);
+  virtual void beginQueryEXT(WGC3Denum target, WebGLId query);
+  virtual void endQueryEXT(WGC3Denum target);
+  virtual void getQueryivEXT(
+      WGC3Denum target, WGC3Denum pname, WGC3Dint* params);
+  virtual void getQueryObjectuivEXT(
+      WebGLId query, WGC3Denum pname, WGC3Duint* params);
+
+  virtual void copyTextureCHROMIUM(WGC3Denum target, WebGLId source_id,
+                                   WebGLId dest_id, WGC3Dint level,
+                                   WGC3Denum internal_format,
+                                   WGC3Denum dest_type);
+
+  virtual void bindUniformLocationCHROMIUM(WebGLId program, WGC3Dint location,
+                                           const WGC3Dchar* uniform);
+
+  virtual void shallowFlushCHROMIUM();
+  virtual void shallowFinishCHROMIUM();
+
+  virtual void genMailboxCHROMIUM(WGC3Dbyte* mailbox);
+  virtual void produceTextureCHROMIUM(WGC3Denum target,
+                                      const WGC3Dbyte* mailbox);
+  virtual void produceTextureDirectCHROMIUM(WebGLId texture, WGC3Denum target,
+                                      const WGC3Dbyte* mailbox);
+  virtual void consumeTextureCHROMIUM(WGC3Denum target,
+                                      const WGC3Dbyte* mailbox);
+  virtual WebGLId createAndConsumeTextureCHROMIUM(WGC3Denum target,
+                                      const WGC3Dbyte* mailbox);
+
+  virtual void genValuebuffersCHROMIUM(WGC3Dsizei count, WebGLId* ids);
+  virtual WebGLId createValuebufferCHROMIUM();
+  virtual void deleteValuebuffersCHROMIUM(WGC3Dsizei count, WebGLId* ids);
+  virtual void deleteValuebufferCHROMIUM(WebGLId);
+  virtual void bindValuebufferCHROMIUM(WGC3Denum target, WebGLId valuebuffer);
+  virtual WGC3Dboolean isValuebufferCHROMIUM(WebGLId renderbuffer);
+  virtual void subscribeValueCHROMIUM(WGC3Denum target, WGC3Denum subscription);
+  virtual void populateSubscribedValuesCHROMIUM(WGC3Denum target);
+  virtual void uniformValuebufferCHROMIUM(WGC3Dint location,
+                                          WGC3Denum target,
+                                          WGC3Denum subscription);
+
+  virtual void insertEventMarkerEXT(const WGC3Dchar* marker);
+  virtual void pushGroupMarkerEXT(const WGC3Dchar* marker);
+  virtual void popGroupMarkerEXT();
+
+  // GL_OES_vertex_array_object
+  virtual WebGLId createVertexArrayOES();
+  virtual void deleteVertexArrayOES(WebGLId array);
+  virtual WGC3Dboolean isVertexArrayOES(WebGLId array);
+  virtual void bindVertexArrayOES(WebGLId array);
+
+  virtual void bindTexImage2DCHROMIUM(WGC3Denum target, WGC3Dint image_id);
+  virtual void releaseTexImage2DCHROMIUM(WGC3Denum target, WGC3Dint image_id);
+
+  virtual void* mapBufferCHROMIUM(WGC3Denum target, WGC3Denum access);
+  virtual WGC3Dboolean unmapBufferCHROMIUM(WGC3Denum target);
+
+  // Async pixel transfer functions.
+  virtual void asyncTexImage2DCHROMIUM(
+      WGC3Denum target,
+      WGC3Dint level,
+      WGC3Denum internalformat,
+      WGC3Dsizei width,
+      WGC3Dsizei height,
+      WGC3Dint border,
+      WGC3Denum format,
+      WGC3Denum type,
+      const void* pixels);
+  virtual void asyncTexSubImage2DCHROMIUM(
+      WGC3Denum target,
+      WGC3Dint level,
+      WGC3Dint xoffset,
+      WGC3Dint yoffset,
+      WGC3Dsizei width,
+      WGC3Dsizei height,
+      WGC3Denum format,
+      WGC3Denum type,
+      const void* pixels);
+  virtual void waitAsyncTexImage2DCHROMIUM(WGC3Denum target);
+
+  // GL_EXT_draw_buffers
+  virtual void drawBuffersEXT(
+      WGC3Dsizei n,
+      const WGC3Denum* bufs);
+
+  // GL_ANGLE_instanced_arrays
+  virtual void drawArraysInstancedANGLE(WGC3Denum mode, WGC3Dint first,
+      WGC3Dsizei count, WGC3Dsizei primcount);
+  virtual void drawElementsInstancedANGLE(WGC3Denum mode, WGC3Dsizei count,
+      WGC3Denum type, WGC3Dintptr offset, WGC3Dsizei primcount);
+  virtual void vertexAttribDivisorANGLE(WGC3Duint index, WGC3Duint divisor);
+
+  // GL_CHROMIUM_gpu_memory_buffer_image
+  virtual WGC3Duint createGpuMemoryBufferImageCHROMIUM(WGC3Dsizei width,
+                                                       WGC3Dsizei height,
+                                                       WGC3Denum internalformat,
+                                                       WGC3Denum usage);
+  virtual void destroyImageCHROMIUM(WGC3Duint image_id);
+
+  // GL_EXT_multisampled_render_to_texture
+  virtual void framebufferTexture2DMultisampleEXT(WGC3Denum target,
+                                    WGC3Denum attachment,
+                                    WGC3Denum textarget,
+                                    WebGLId texture,
+                                    WGC3Dint level,
+                                    WGC3Dsizei samples);
+  virtual void renderbufferStorageMultisampleEXT(
+      WGC3Denum target, WGC3Dsizei samples, WGC3Denum internalformat,
+      WGC3Dsizei width, WGC3Dsizei height);
+
+  virtual GrGLInterface* createGrGLInterface();
+
+  ::gpu::gles2::GLES2Interface* GetGLInterface() {
+    return gl_;
+  }
+
+  // Convert WebGL context creation attributes into command buffer / EGL size
+  // requests.
+  static void ConvertAttributes(
+      const blink::WebGraphicsContext3D::Attributes& attributes,
+      ::gpu::gles2::ContextCreationAttribHelper* output_attribs);
+
+ protected:
+  friend class WebGraphicsContext3DErrorMessageCallback;
+
+  WebGraphicsContext3DImpl();
+
+  ::gpu::gles2::GLES2ImplementationErrorMessageCallback*
+      getErrorMessageCallback();
+  virtual void OnErrorMessage(const std::string& message, int id);
+
+  void setGLInterface(::gpu::gles2::GLES2Interface* gl) {
+    gl_ = gl;
+  }
+
+  bool initialized_;
+  bool initialize_failed_;
+
+  WebGraphicsContext3D::WebGraphicsContextLostCallback* context_lost_callback_;
+  WGC3Denum context_lost_reason_;
+
+  WebGraphicsContext3D::WebGraphicsErrorMessageCallback*
+      error_message_callback_;
+  scoped_ptr<WebGraphicsContext3DErrorMessageCallback>
+      client_error_message_callback_;
+
+  // Errors raised by synthesizeGLError().
+  std::vector<WGC3Denum> synthetic_errors_;
+
+  ::gpu::gles2::GLES2Interface* gl_;
+  bool lose_context_when_out_of_memory_;
+  uint32_t flush_id_;
+};
+
+}  // namespace gpu_blink
+
+#endif  // GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_