Update from https://crrev.com/309415

gpu/blink/webgraphicscontext3d_impl.cc

Index: gpu/blink/webgraphicscontext3d_impl.cc
diff --git a/gpu/blink/webgraphicscontext3d_impl.cc b/gpu/blink/webgraphicscontext3d_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e0cbec449d1117f0a26923253420ac6d073fd25b
--- /dev/null
+++ b/gpu/blink/webgraphicscontext3d_impl.cc
@@ -0,0 +1,1030 @@
+// 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 "gpu/blink/webgraphicscontext3d_impl.h"
+
+#include "base/atomicops.h"
+#include "base/lazy_instance.h"
+#include "base/logging.h"
+#include "gpu/GLES2/gl2extchromium.h"
+#include "gpu/command_buffer/client/gles2_implementation.h"
+#include "gpu/command_buffer/client/gles2_lib.h"
+#include "gpu/command_buffer/common/gles2_cmd_utils.h"
+#include "gpu/skia_bindings/gl_bindings_skia_cmd_buffer.h"
+
+#include "third_party/khronos/GLES2/gl2.h"
+#ifndef GL_GLEXT_PROTOTYPES
+#define GL_GLEXT_PROTOTYPES 1
+#endif
+#include "third_party/khronos/GLES2/gl2ext.h"
+
+namespace gpu_blink {
+
+namespace {
+
+uint32_t GenFlushID() {
+  static base::subtle::Atomic32 flush_id = 0;
+
+  base::subtle::Atomic32 my_id = base::subtle::Barrier_AtomicIncrement(
+      &flush_id, 1);
+  return static_cast<uint32_t>(my_id);
+}
+
+} // namespace anonymous
+
+class WebGraphicsContext3DErrorMessageCallback
+    : public ::gpu::gles2::GLES2ImplementationErrorMessageCallback {
+ public:
+  WebGraphicsContext3DErrorMessageCallback(
+      WebGraphicsContext3DImpl* context)
+      : graphics_context_(context) {
+  }
+
+  virtual void OnErrorMessage(const char* msg, int id) override;
+
+ private:
+  WebGraphicsContext3DImpl* graphics_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebGraphicsContext3DErrorMessageCallback);
+};
+
+void WebGraphicsContext3DErrorMessageCallback::OnErrorMessage(
+    const char* msg, int id) {
+  graphics_context_->OnErrorMessage(msg, id);
+}
+
+// Helper macros to reduce the amount of code.
+
+#define DELEGATE_TO_GL(name, glname)                                    \
+void WebGraphicsContext3DImpl::name() {                                 \
+  gl_->glname();                                                        \
+}
+
+#define DELEGATE_TO_GL_R(name, glname, rt)                              \
+rt WebGraphicsContext3DImpl::name() {                                   \
+  return gl_->glname();                                                 \
+}
+
+#define DELEGATE_TO_GL_1(name, glname, t1)                              \
+void WebGraphicsContext3DImpl::name(t1 a1) {                            \
+  gl_->glname(a1);                                                      \
+}
+
+#define DELEGATE_TO_GL_1R(name, glname, t1, rt)                         \
+rt WebGraphicsContext3DImpl::name(t1 a1) {                              \
+  return gl_->glname(a1);                                               \
+}
+
+#define DELEGATE_TO_GL_1RB(name, glname, t1, rt)                        \
+rt WebGraphicsContext3DImpl::name(t1 a1) {                              \
+  return gl_->glname(a1) ? true : false;                                \
+}
+
+#define DELEGATE_TO_GL_2(name, glname, t1, t2)                          \
+void WebGraphicsContext3DImpl::name(t1 a1, t2 a2) {                     \
+  gl_->glname(a1, a2);                                                  \
+}
+
+#define DELEGATE_TO_GL_2R(name, glname, t1, t2, rt)                     \
+rt WebGraphicsContext3DImpl::name(t1 a1, t2 a2) {                       \
+  return gl_->glname(a1, a2);                                           \
+}
+
+#define DELEGATE_TO_GL_3(name, glname, t1, t2, t3)                      \
+void WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3) {              \
+  gl_->glname(a1, a2, a3);                                              \
+}
+
+#define DELEGATE_TO_GL_3R(name, glname, t1, t2, t3, rt)                 \
+rt WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3) {                \
+  return gl_->glname(a1, a2, a3);                                       \
+}
+
+#define DELEGATE_TO_GL_4(name, glname, t1, t2, t3, t4)                  \
+void WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3, t4 a4) {       \
+  gl_->glname(a1, a2, a3, a4);                                          \
+}
+
+#define DELEGATE_TO_GL_4R(name, glname, t1, t2, t3, t4, rt)             \
+rt WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3, t4 a4) {         \
+  return gl_->glname(a1, a2, a3, a4);                                   \
+}
+
+#define DELEGATE_TO_GL_5(name, glname, t1, t2, t3, t4, t5)              \
+void WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5) {\
+                                                                        \
+  gl_->glname(a1, a2, a3, a4, a5);                                      \
+}
+
+#define DELEGATE_TO_GL_6(name, glname, t1, t2, t3, t4, t5, t6)          \
+void WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5,  \
+                                    t6 a6) {                            \
+  gl_->glname(a1, a2, a3, a4, a5, a6);                                  \
+}
+
+#define DELEGATE_TO_GL_7(name, glname, t1, t2, t3, t4, t5, t6, t7)      \
+void WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5,  \
+                                    t6 a6, t7 a7) {                     \
+  gl_->glname(a1, a2, a3, a4, a5, a6, a7);                              \
+}
+
+#define DELEGATE_TO_GL_8(name, glname, t1, t2, t3, t4, t5, t6, t7, t8)  \
+void WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5,  \
+                                    t6 a6, t7 a7, t8 a8) {              \
+  gl_->glname(a1, a2, a3, a4, a5, a6, a7, a8);                          \
+}
+
+#define DELEGATE_TO_GL_9(name, glname, t1, t2, t3, t4, t5, t6, t7, t8, t9) \
+void WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5,  \
+                                    t6 a6, t7 a7, t8 a8, t9 a9) {       \
+  gl_->glname(a1, a2, a3, a4, a5, a6, a7, a8, a9);                      \
+}
+
+#define DELEGATE_TO_GL_9R(name, glname, t1, t2, t3, t4, t5, t6, t7, t8, \
+                          t9, rt)                                       \
+rt WebGraphicsContext3DImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, t5 a5,    \
+                                    t6 a6, t7 a7, t8 a8, t9 a9) {       \
+  return gl_->glname(a1, a2, a3, a4, a5, a6, a7, a8, a9);               \
+}
+
+WebGraphicsContext3DImpl::WebGraphicsContext3DImpl()
+    : initialized_(false),
+      initialize_failed_(false),
+      context_lost_callback_(0),
+      context_lost_reason_(GL_NO_ERROR),
+      error_message_callback_(0),
+      gl_(NULL),
+      flush_id_(0) {
+}
+
+WebGraphicsContext3DImpl::~WebGraphicsContext3DImpl() {
+
+}
+
+void WebGraphicsContext3DImpl::synthesizeGLError(WGC3Denum error) {
+  if (std::find(synthetic_errors_.begin(), synthetic_errors_.end(), error) ==
+      synthetic_errors_.end()) {
+    synthetic_errors_.push_back(error);
+  }
+}
+
+uint32_t WebGraphicsContext3DImpl::lastFlushID() {
+  return flush_id_;
+}
+
+DELEGATE_TO_GL_R(insertSyncPoint, InsertSyncPointCHROMIUM, unsigned int)
+
+DELEGATE_TO_GL_3(reshapeWithScaleFactor, ResizeCHROMIUM, int, int, float)
+
+DELEGATE_TO_GL_4R(mapBufferSubDataCHROMIUM, MapBufferSubDataCHROMIUM, WGC3Denum,
+                  WGC3Dintptr, WGC3Dsizeiptr, WGC3Denum, void*)
+
+DELEGATE_TO_GL_1(unmapBufferSubDataCHROMIUM, UnmapBufferSubDataCHROMIUM,
+                 const void*)
+
+DELEGATE_TO_GL_9R(mapTexSubImage2DCHROMIUM, MapTexSubImage2DCHROMIUM, WGC3Denum,
+                  WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dsizei, WGC3Dsizei,
+                  WGC3Denum, WGC3Denum, WGC3Denum, void*)
+
+DELEGATE_TO_GL_1(unmapTexSubImage2DCHROMIUM, UnmapTexSubImage2DCHROMIUM,
+                 const void*)
+
+DELEGATE_TO_GL_3(discardFramebufferEXT, DiscardFramebufferEXT, WGC3Denum,
+                 WGC3Dsizei, const WGC3Denum*)
+
+blink::WebString WebGraphicsContext3DImpl::
+    getRequestableExtensionsCHROMIUM() {
+  return blink::WebString::fromUTF8(
+      gl_->GetRequestableExtensionsCHROMIUM());
+}
+
+DELEGATE_TO_GL_1(requestExtensionCHROMIUM, RequestExtensionCHROMIUM,
+                 const char*)
+
+void WebGraphicsContext3DImpl::blitFramebufferCHROMIUM(
+    WGC3Dint srcX0, WGC3Dint srcY0, WGC3Dint srcX1, WGC3Dint srcY1,
+    WGC3Dint dstX0, WGC3Dint dstY0, WGC3Dint dstX1, WGC3Dint dstY1,
+    WGC3Dbitfield mask, WGC3Denum filter) {
+  gl_->BlitFramebufferCHROMIUM(
+      srcX0, srcY0, srcX1, srcY1,
+      dstX0, dstY0, dstX1, dstY1,
+      mask, filter);
+}
+
+DELEGATE_TO_GL_5(renderbufferStorageMultisampleCHROMIUM,
+                 RenderbufferStorageMultisampleCHROMIUM, WGC3Denum, WGC3Dsizei,
+                 WGC3Denum, WGC3Dsizei, WGC3Dsizei)
+
+DELEGATE_TO_GL_1(activeTexture, ActiveTexture, WGC3Denum)
+
+DELEGATE_TO_GL_2(attachShader, AttachShader, WebGLId, WebGLId)
+
+DELEGATE_TO_GL_3(bindAttribLocation, BindAttribLocation, WebGLId,
+                 WGC3Duint, const WGC3Dchar*)
+
+DELEGATE_TO_GL_2(bindBuffer, BindBuffer, WGC3Denum, WebGLId)
+
+DELEGATE_TO_GL_2(bindFramebuffer, BindFramebuffer, WGC3Denum, WebGLId)
+
+DELEGATE_TO_GL_2(bindRenderbuffer, BindRenderbuffer, WGC3Denum, WebGLId)
+
+DELEGATE_TO_GL_2(bindTexture, BindTexture, WGC3Denum, WebGLId)
+
+DELEGATE_TO_GL_4(blendColor, BlendColor,
+                 WGC3Dclampf, WGC3Dclampf, WGC3Dclampf, WGC3Dclampf)
+
+DELEGATE_TO_GL_1(blendEquation, BlendEquation, WGC3Denum)
+
+DELEGATE_TO_GL_2(blendEquationSeparate, BlendEquationSeparate,
+                 WGC3Denum, WGC3Denum)
+
+DELEGATE_TO_GL_2(blendFunc, BlendFunc, WGC3Denum, WGC3Denum)
+
+DELEGATE_TO_GL_4(blendFuncSeparate, BlendFuncSeparate,
+                 WGC3Denum, WGC3Denum, WGC3Denum, WGC3Denum)
+
+DELEGATE_TO_GL_4(bufferData, BufferData,
+                 WGC3Denum, WGC3Dsizeiptr, const void*, WGC3Denum)
+
+DELEGATE_TO_GL_4(bufferSubData, BufferSubData,
+                 WGC3Denum, WGC3Dintptr, WGC3Dsizeiptr, const void*)
+
+DELEGATE_TO_GL_1R(checkFramebufferStatus, CheckFramebufferStatus,
+                  WGC3Denum, WGC3Denum)
+
+DELEGATE_TO_GL_1(clear, Clear, WGC3Dbitfield)
+
+DELEGATE_TO_GL_4(clearColor, ClearColor,
+                 WGC3Dclampf, WGC3Dclampf, WGC3Dclampf, WGC3Dclampf)
+
+DELEGATE_TO_GL_1(clearDepth, ClearDepthf, WGC3Dclampf)
+
+DELEGATE_TO_GL_1(clearStencil, ClearStencil, WGC3Dint)
+
+DELEGATE_TO_GL_4(colorMask, ColorMask,
+                 WGC3Dboolean, WGC3Dboolean, WGC3Dboolean, WGC3Dboolean)
+
+DELEGATE_TO_GL_1(compileShader, CompileShader, WebGLId)
+
+DELEGATE_TO_GL_8(compressedTexImage2D, CompressedTexImage2D,
+                 WGC3Denum, WGC3Dint, WGC3Denum, WGC3Dint, WGC3Dint,
+                 WGC3Dsizei, WGC3Dsizei, const void*)
+
+DELEGATE_TO_GL_9(compressedTexSubImage2D, CompressedTexSubImage2D,
+                 WGC3Denum, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint,
+                 WGC3Denum, WGC3Dsizei, const void*)
+
+DELEGATE_TO_GL_8(copyTexImage2D, CopyTexImage2D,
+                 WGC3Denum, WGC3Dint, WGC3Denum, WGC3Dint, WGC3Dint,
+                 WGC3Dsizei, WGC3Dsizei, WGC3Dint)
+
+DELEGATE_TO_GL_8(copyTexSubImage2D, CopyTexSubImage2D,
+                 WGC3Denum, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint,
+                 WGC3Dsizei, WGC3Dsizei)
+
+DELEGATE_TO_GL_1(cullFace, CullFace, WGC3Denum)
+
+DELEGATE_TO_GL_1(depthFunc, DepthFunc, WGC3Denum)
+
+DELEGATE_TO_GL_1(depthMask, DepthMask, WGC3Dboolean)
+
+DELEGATE_TO_GL_2(depthRange, DepthRangef, WGC3Dclampf, WGC3Dclampf)
+
+DELEGATE_TO_GL_2(detachShader, DetachShader, WebGLId, WebGLId)
+
+DELEGATE_TO_GL_1(disable, Disable, WGC3Denum)
+
+DELEGATE_TO_GL_1(disableVertexAttribArray, DisableVertexAttribArray,
+                 WGC3Duint)
+
+DELEGATE_TO_GL_3(drawArrays, DrawArrays, WGC3Denum, WGC3Dint, WGC3Dsizei)
+
+void WebGraphicsContext3DImpl::drawElements(WGC3Denum mode,
+                                                         WGC3Dsizei count,
+                                                         WGC3Denum type,
+                                                         WGC3Dintptr offset) {
+  gl_->DrawElements(
+      mode, count, type,
+      reinterpret_cast<void*>(static_cast<intptr_t>(offset)));
+}
+
+DELEGATE_TO_GL_1(enable, Enable, WGC3Denum)
+
+DELEGATE_TO_GL_1(enableVertexAttribArray, EnableVertexAttribArray,
+                 WGC3Duint)
+
+void WebGraphicsContext3DImpl::finish() {
+  flush_id_ = GenFlushID();
+  gl_->Finish();
+}
+
+void WebGraphicsContext3DImpl::flush() {
+  flush_id_ = GenFlushID();
+  gl_->Flush();
+}
+
+DELEGATE_TO_GL_4(framebufferRenderbuffer, FramebufferRenderbuffer,
+                 WGC3Denum, WGC3Denum, WGC3Denum, WebGLId)
+
+DELEGATE_TO_GL_5(framebufferTexture2D, FramebufferTexture2D,
+                 WGC3Denum, WGC3Denum, WGC3Denum, WebGLId, WGC3Dint)
+
+DELEGATE_TO_GL_1(frontFace, FrontFace, WGC3Denum)
+
+DELEGATE_TO_GL_1(generateMipmap, GenerateMipmap, WGC3Denum)
+
+bool WebGraphicsContext3DImpl::getActiveAttrib(
+    WebGLId program, WGC3Duint index, ActiveInfo& info) {
+  if (!program) {
+    synthesizeGLError(GL_INVALID_VALUE);
+    return false;
+  }
+  GLint max_name_length = -1;
+  gl_->GetProgramiv(
+      program, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &max_name_length);
+  if (max_name_length < 0)
+    return false;
+  scoped_ptr<GLchar[]> name(new GLchar[max_name_length]);
+  if (!name) {
+    synthesizeGLError(GL_OUT_OF_MEMORY);
+    return false;
+  }
+  GLsizei length = 0;
+  GLint size = -1;
+  GLenum type = 0;
+  gl_->GetActiveAttrib(
+      program, index, max_name_length, &length, &size, &type, name.get());
+  if (size < 0) {
+    return false;
+  }
+  info.name = blink::WebString::fromUTF8(name.get(), length);
+  info.type = type;
+  info.size = size;
+  return true;
+}
+
+bool WebGraphicsContext3DImpl::getActiveUniform(
+    WebGLId program, WGC3Duint index, ActiveInfo& info) {
+  GLint max_name_length = -1;
+  gl_->GetProgramiv(
+      program, GL_ACTIVE_UNIFORM_MAX_LENGTH, &max_name_length);
+  if (max_name_length < 0)
+    return false;
+  scoped_ptr<GLchar[]> name(new GLchar[max_name_length]);
+  if (!name) {
+    synthesizeGLError(GL_OUT_OF_MEMORY);
+    return false;
+  }
+  GLsizei length = 0;
+  GLint size = -1;
+  GLenum type = 0;
+  gl_->GetActiveUniform(
+      program, index, max_name_length, &length, &size, &type, name.get());
+  if (size < 0) {
+    return false;
+  }
+  info.name = blink::WebString::fromUTF8(name.get(), length);
+  info.type = type;
+  info.size = size;
+  return true;
+}
+
+DELEGATE_TO_GL_4(getAttachedShaders, GetAttachedShaders,
+                 WebGLId, WGC3Dsizei, WGC3Dsizei*, WebGLId*)
+
+DELEGATE_TO_GL_2R(getAttribLocation, GetAttribLocation,
+                  WebGLId, const WGC3Dchar*, WGC3Dint)
+
+DELEGATE_TO_GL_2(getBooleanv, GetBooleanv, WGC3Denum, WGC3Dboolean*)
+
+DELEGATE_TO_GL_3(getBufferParameteriv, GetBufferParameteriv,
+                 WGC3Denum, WGC3Denum, WGC3Dint*)
+
+WGC3Denum WebGraphicsContext3DImpl::getError() {
+  if (!synthetic_errors_.empty()) {
+    std::vector<WGC3Denum>::iterator iter = synthetic_errors_.begin();
+    WGC3Denum err = *iter;
+    synthetic_errors_.erase(iter);
+    return err;
+  }
+
+  return gl_->GetError();
+}
+
+DELEGATE_TO_GL_2(getFloatv, GetFloatv, WGC3Denum, WGC3Dfloat*)
+
+DELEGATE_TO_GL_4(getFramebufferAttachmentParameteriv,
+                 GetFramebufferAttachmentParameteriv,
+                 WGC3Denum, WGC3Denum, WGC3Denum, WGC3Dint*)
+
+DELEGATE_TO_GL_2(getIntegerv, GetIntegerv, WGC3Denum, WGC3Dint*)
+
+DELEGATE_TO_GL_3(getProgramiv, GetProgramiv, WebGLId, WGC3Denum, WGC3Dint*)
+
+blink::WebString WebGraphicsContext3DImpl::getProgramInfoLog(
+    WebGLId program) {
+  GLint logLength = 0;
+  gl_->GetProgramiv(program, GL_INFO_LOG_LENGTH, &logLength);
+  if (!logLength)
+    return blink::WebString();
+  scoped_ptr<GLchar[]> log(new GLchar[logLength]);
+  if (!log)
+    return blink::WebString();
+  GLsizei returnedLogLength = 0;
+  gl_->GetProgramInfoLog(
+      program, logLength, &returnedLogLength, log.get());
+  DCHECK_EQ(logLength, returnedLogLength + 1);
+  blink::WebString res =
+      blink::WebString::fromUTF8(log.get(), returnedLogLength);
+  return res;
+}
+
+DELEGATE_TO_GL_3(getRenderbufferParameteriv, GetRenderbufferParameteriv,
+                 WGC3Denum, WGC3Denum, WGC3Dint*)
+
+DELEGATE_TO_GL_3(getShaderiv, GetShaderiv, WebGLId, WGC3Denum, WGC3Dint*)
+
+blink::WebString WebGraphicsContext3DImpl::getShaderInfoLog(
+    WebGLId shader) {
+  GLint logLength = 0;
+  gl_->GetShaderiv(shader, GL_INFO_LOG_LENGTH, &logLength);
+  if (!logLength)
+    return blink::WebString();
+  scoped_ptr<GLchar[]> log(new GLchar[logLength]);
+  if (!log)
+    return blink::WebString();
+  GLsizei returnedLogLength = 0;
+  gl_->GetShaderInfoLog(
+      shader, logLength, &returnedLogLength, log.get());
+  DCHECK_EQ(logLength, returnedLogLength + 1);
+  blink::WebString res =
+      blink::WebString::fromUTF8(log.get(), returnedLogLength);
+  return res;
+}
+
+DELEGATE_TO_GL_4(getShaderPrecisionFormat, GetShaderPrecisionFormat,
+                 WGC3Denum, WGC3Denum, WGC3Dint*, WGC3Dint*)
+
+blink::WebString WebGraphicsContext3DImpl::getShaderSource(
+    WebGLId shader) {
+  GLint logLength = 0;
+  gl_->GetShaderiv(shader, GL_SHADER_SOURCE_LENGTH, &logLength);
+  if (!logLength)
+    return blink::WebString();
+  scoped_ptr<GLchar[]> log(new GLchar[logLength]);
+  if (!log)
+    return blink::WebString();
+  GLsizei returnedLogLength = 0;
+  gl_->GetShaderSource(
+      shader, logLength, &returnedLogLength, log.get());
+  if (!returnedLogLength)
+    return blink::WebString();
+  DCHECK_EQ(logLength, returnedLogLength + 1);
+  blink::WebString res =
+      blink::WebString::fromUTF8(log.get(), returnedLogLength);
+  return res;
+}
+
+blink::WebString WebGraphicsContext3DImpl::
+    getTranslatedShaderSourceANGLE(WebGLId shader) {
+  GLint logLength = 0;
+  gl_->GetShaderiv(
+      shader, GL_TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE, &logLength);
+  if (!logLength)
+    return blink::WebString();
+  scoped_ptr<GLchar[]> log(new GLchar[logLength]);
+  if (!log)
+    return blink::WebString();
+  GLsizei returnedLogLength = 0;
+  gl_->GetTranslatedShaderSourceANGLE(
+      shader, logLength, &returnedLogLength, log.get());
+  if (!returnedLogLength)
+    return blink::WebString();
+  DCHECK_EQ(logLength, returnedLogLength + 1);
+  blink::WebString res =
+      blink::WebString::fromUTF8(log.get(), returnedLogLength);
+  return res;
+}
+
+blink::WebString WebGraphicsContext3DImpl::getString(
+    WGC3Denum name) {
+  return blink::WebString::fromUTF8(
+      reinterpret_cast<const char*>(gl_->GetString(name)));
+}
+
+DELEGATE_TO_GL_3(getTexParameterfv, GetTexParameterfv,
+                 WGC3Denum, WGC3Denum, WGC3Dfloat*)
+
+DELEGATE_TO_GL_3(getTexParameteriv, GetTexParameteriv,
+                 WGC3Denum, WGC3Denum, WGC3Dint*)
+
+DELEGATE_TO_GL_3(getUniformfv, GetUniformfv, WebGLId, WGC3Dint, WGC3Dfloat*)
+
+DELEGATE_TO_GL_3(getUniformiv, GetUniformiv, WebGLId, WGC3Dint, WGC3Dint*)
+
+DELEGATE_TO_GL_2R(getUniformLocation, GetUniformLocation,
+                  WebGLId, const WGC3Dchar*, WGC3Dint)
+
+DELEGATE_TO_GL_3(getVertexAttribfv, GetVertexAttribfv,
+                 WGC3Duint, WGC3Denum, WGC3Dfloat*)
+
+DELEGATE_TO_GL_3(getVertexAttribiv, GetVertexAttribiv,
+                 WGC3Duint, WGC3Denum, WGC3Dint*)
+
+WGC3Dsizeiptr WebGraphicsContext3DImpl::getVertexAttribOffset(
+    WGC3Duint index, WGC3Denum pname) {
+  GLvoid* value = NULL;
+  // NOTE: If pname is ever a value that returns more then 1 element
+  // this will corrupt memory.
+  gl_->GetVertexAttribPointerv(index, pname, &value);
+  return static_cast<WGC3Dsizeiptr>(reinterpret_cast<intptr_t>(value));
+}
+
+DELEGATE_TO_GL_2(hint, Hint, WGC3Denum, WGC3Denum)
+
+DELEGATE_TO_GL_1RB(isBuffer, IsBuffer, WebGLId, WGC3Dboolean)
+
+DELEGATE_TO_GL_1RB(isEnabled, IsEnabled, WGC3Denum, WGC3Dboolean)
+
+DELEGATE_TO_GL_1RB(isFramebuffer, IsFramebuffer, WebGLId, WGC3Dboolean)
+
+DELEGATE_TO_GL_1RB(isProgram, IsProgram, WebGLId, WGC3Dboolean)
+
+DELEGATE_TO_GL_1RB(isRenderbuffer, IsRenderbuffer, WebGLId, WGC3Dboolean)
+
+DELEGATE_TO_GL_1RB(isShader, IsShader, WebGLId, WGC3Dboolean)
+
+DELEGATE_TO_GL_1RB(isTexture, IsTexture, WebGLId, WGC3Dboolean)
+
+DELEGATE_TO_GL_1(lineWidth, LineWidth, WGC3Dfloat)
+
+DELEGATE_TO_GL_1(linkProgram, LinkProgram, WebGLId)
+
+DELEGATE_TO_GL_2(pixelStorei, PixelStorei, WGC3Denum, WGC3Dint)
+
+DELEGATE_TO_GL_2(polygonOffset, PolygonOffset, WGC3Dfloat, WGC3Dfloat)
+
+DELEGATE_TO_GL_7(readPixels, ReadPixels,
+                 WGC3Dint, WGC3Dint, WGC3Dsizei, WGC3Dsizei, WGC3Denum,
+                 WGC3Denum, void*)
+
+DELEGATE_TO_GL_4(renderbufferStorage, RenderbufferStorage,
+                 WGC3Denum, WGC3Denum, WGC3Dsizei, WGC3Dsizei)
+
+DELEGATE_TO_GL_2(sampleCoverage, SampleCoverage, WGC3Dfloat, WGC3Dboolean)
+
+DELEGATE_TO_GL_4(scissor, Scissor, WGC3Dint, WGC3Dint, WGC3Dsizei, WGC3Dsizei)
+
+void WebGraphicsContext3DImpl::shaderSource(
+    WebGLId shader, const WGC3Dchar* string) {
+  GLint length = strlen(string);
+  gl_->ShaderSource(shader, 1, &string, &length);
+}
+
+DELEGATE_TO_GL_3(stencilFunc, StencilFunc, WGC3Denum, WGC3Dint, WGC3Duint)
+
+DELEGATE_TO_GL_4(stencilFuncSeparate, StencilFuncSeparate,
+                 WGC3Denum, WGC3Denum, WGC3Dint, WGC3Duint)
+
+DELEGATE_TO_GL_1(stencilMask, StencilMask, WGC3Duint)
+
+DELEGATE_TO_GL_2(stencilMaskSeparate, StencilMaskSeparate,
+                 WGC3Denum, WGC3Duint)
+
+DELEGATE_TO_GL_3(stencilOp, StencilOp,
+                 WGC3Denum, WGC3Denum, WGC3Denum)
+
+DELEGATE_TO_GL_4(stencilOpSeparate, StencilOpSeparate,
+                 WGC3Denum, WGC3Denum, WGC3Denum, WGC3Denum)
+
+DELEGATE_TO_GL_9(texImage2D, TexImage2D,
+                 WGC3Denum, WGC3Dint, WGC3Denum, WGC3Dsizei, WGC3Dsizei,
+                 WGC3Dint, WGC3Denum, WGC3Denum, const void*)
+
+DELEGATE_TO_GL_3(texParameterf, TexParameterf,
+                 WGC3Denum, WGC3Denum, WGC3Dfloat);
+
+static const unsigned int kTextureWrapR = 0x8072;
+
+void WebGraphicsContext3DImpl::texParameteri(
+    WGC3Denum target, WGC3Denum pname, WGC3Dint param) {
+  // TODO(kbr): figure out whether the setting of TEXTURE_WRAP_R in
+  // GraphicsContext3D.cpp is strictly necessary to avoid seams at the
+  // edge of cube maps, and, if it is, push it into the GLES2 service
+  // side code.
+  if (pname == kTextureWrapR) {
+    return;
+  }
+  gl_->TexParameteri(target, pname, param);
+}
+
+DELEGATE_TO_GL_9(texSubImage2D, TexSubImage2D,
+                 WGC3Denum, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dsizei,
+                 WGC3Dsizei, WGC3Denum, WGC3Denum, const void*)
+
+DELEGATE_TO_GL_2(uniform1f, Uniform1f, WGC3Dint, WGC3Dfloat)
+
+DELEGATE_TO_GL_3(uniform1fv, Uniform1fv, WGC3Dint, WGC3Dsizei,
+                 const WGC3Dfloat*)
+
+DELEGATE_TO_GL_2(uniform1i, Uniform1i, WGC3Dint, WGC3Dint)
+
+DELEGATE_TO_GL_3(uniform1iv, Uniform1iv, WGC3Dint, WGC3Dsizei, const WGC3Dint*)
+
+DELEGATE_TO_GL_3(uniform2f, Uniform2f, WGC3Dint, WGC3Dfloat, WGC3Dfloat)
+
+DELEGATE_TO_GL_3(uniform2fv, Uniform2fv, WGC3Dint, WGC3Dsizei,
+                 const WGC3Dfloat*)
+
+DELEGATE_TO_GL_3(uniform2i, Uniform2i, WGC3Dint, WGC3Dint, WGC3Dint)
+
+DELEGATE_TO_GL_3(uniform2iv, Uniform2iv, WGC3Dint, WGC3Dsizei, const WGC3Dint*)
+
+DELEGATE_TO_GL_4(uniform3f, Uniform3f, WGC3Dint,
+                 WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
+
+DELEGATE_TO_GL_3(uniform3fv, Uniform3fv, WGC3Dint, WGC3Dsizei,
+                 const WGC3Dfloat*)
+
+DELEGATE_TO_GL_4(uniform3i, Uniform3i, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint)
+
+DELEGATE_TO_GL_3(uniform3iv, Uniform3iv, WGC3Dint, WGC3Dsizei, const WGC3Dint*)
+
+DELEGATE_TO_GL_5(uniform4f, Uniform4f, WGC3Dint,
+                 WGC3Dfloat, WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
+
+DELEGATE_TO_GL_3(uniform4fv, Uniform4fv, WGC3Dint, WGC3Dsizei,
+                 const WGC3Dfloat*)
+
+DELEGATE_TO_GL_5(uniform4i, Uniform4i, WGC3Dint,
+                 WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint)
+
+DELEGATE_TO_GL_3(uniform4iv, Uniform4iv, WGC3Dint, WGC3Dsizei, const WGC3Dint*)
+
+DELEGATE_TO_GL_4(uniformMatrix2fv, UniformMatrix2fv,
+                 WGC3Dint, WGC3Dsizei, WGC3Dboolean, const WGC3Dfloat*)
+
+DELEGATE_TO_GL_4(uniformMatrix3fv, UniformMatrix3fv,
+                 WGC3Dint, WGC3Dsizei, WGC3Dboolean, const WGC3Dfloat*)
+
+DELEGATE_TO_GL_4(uniformMatrix4fv, UniformMatrix4fv,
+                 WGC3Dint, WGC3Dsizei, WGC3Dboolean, const WGC3Dfloat*)
+
+DELEGATE_TO_GL_1(useProgram, UseProgram, WebGLId)
+
+DELEGATE_TO_GL_1(validateProgram, ValidateProgram, WebGLId)
+
+DELEGATE_TO_GL_2(vertexAttrib1f, VertexAttrib1f, WGC3Duint, WGC3Dfloat)
+
+DELEGATE_TO_GL_2(vertexAttrib1fv, VertexAttrib1fv, WGC3Duint,
+                 const WGC3Dfloat*)
+
+DELEGATE_TO_GL_3(vertexAttrib2f, VertexAttrib2f, WGC3Duint,
+                 WGC3Dfloat, WGC3Dfloat)
+
+DELEGATE_TO_GL_2(vertexAttrib2fv, VertexAttrib2fv, WGC3Duint,
+                 const WGC3Dfloat*)
+
+DELEGATE_TO_GL_4(vertexAttrib3f, VertexAttrib3f, WGC3Duint,
+                 WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
+
+DELEGATE_TO_GL_2(vertexAttrib3fv, VertexAttrib3fv, WGC3Duint,
+                 const WGC3Dfloat*)
+
+DELEGATE_TO_GL_5(vertexAttrib4f, VertexAttrib4f, WGC3Duint,
+                 WGC3Dfloat, WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
+
+DELEGATE_TO_GL_2(vertexAttrib4fv, VertexAttrib4fv, WGC3Duint,
+                 const WGC3Dfloat*)
+
+void WebGraphicsContext3DImpl::vertexAttribPointer(
+    WGC3Duint index, WGC3Dint size, WGC3Denum type, WGC3Dboolean normalized,
+    WGC3Dsizei stride, WGC3Dintptr offset) {
+  gl_->VertexAttribPointer(
+      index, size, type, normalized, stride,
+      reinterpret_cast<void*>(static_cast<intptr_t>(offset)));
+}
+
+DELEGATE_TO_GL_4(viewport, Viewport,
+                 WGC3Dint, WGC3Dint, WGC3Dsizei, WGC3Dsizei)
+
+DELEGATE_TO_GL_2(genBuffers, GenBuffers, WGC3Dsizei, WebGLId*);
+
+DELEGATE_TO_GL_2(genFramebuffers, GenFramebuffers, WGC3Dsizei, WebGLId*);
+
+DELEGATE_TO_GL_2(genRenderbuffers, GenRenderbuffers, WGC3Dsizei, WebGLId*);
+
+DELEGATE_TO_GL_2(genTextures, GenTextures, WGC3Dsizei, WebGLId*);
+
+DELEGATE_TO_GL_2(deleteBuffers, DeleteBuffers, WGC3Dsizei, WebGLId*);
+
+DELEGATE_TO_GL_2(deleteFramebuffers, DeleteFramebuffers, WGC3Dsizei, WebGLId*);
+
+DELEGATE_TO_GL_2(deleteRenderbuffers, DeleteRenderbuffers, WGC3Dsizei,
+                 WebGLId*);
+
+DELEGATE_TO_GL_2(deleteTextures, DeleteTextures, WGC3Dsizei, WebGLId*);
+
+WebGLId WebGraphicsContext3DImpl::createBuffer() {
+  GLuint o;
+  gl_->GenBuffers(1, &o);
+  return o;
+}
+
+WebGLId WebGraphicsContext3DImpl::createFramebuffer() {
+  GLuint o = 0;
+  gl_->GenFramebuffers(1, &o);
+  return o;
+}
+
+WebGLId WebGraphicsContext3DImpl::createRenderbuffer() {
+  GLuint o;
+  gl_->GenRenderbuffers(1, &o);
+  return o;
+}
+
+WebGLId WebGraphicsContext3DImpl::createTexture() {
+  GLuint o;
+  gl_->GenTextures(1, &o);
+  return o;
+}
+
+void WebGraphicsContext3DImpl::deleteBuffer(WebGLId buffer) {
+  gl_->DeleteBuffers(1, &buffer);
+}
+
+void WebGraphicsContext3DImpl::deleteFramebuffer(
+    WebGLId framebuffer) {
+  gl_->DeleteFramebuffers(1, &framebuffer);
+}
+
+void WebGraphicsContext3DImpl::deleteRenderbuffer(
+    WebGLId renderbuffer) {
+  gl_->DeleteRenderbuffers(1, &renderbuffer);
+}
+
+void WebGraphicsContext3DImpl::deleteTexture(WebGLId texture) {
+  gl_->DeleteTextures(1, &texture);
+}
+
+DELEGATE_TO_GL_R(createProgram, CreateProgram, WebGLId)
+
+DELEGATE_TO_GL_1R(createShader, CreateShader, WGC3Denum, WebGLId)
+
+DELEGATE_TO_GL_1(deleteProgram, DeleteProgram, WebGLId)
+
+DELEGATE_TO_GL_1(deleteShader, DeleteShader, WebGLId)
+
+void WebGraphicsContext3DImpl::setErrorMessageCallback(
+    WebGraphicsContext3D::WebGraphicsErrorMessageCallback* cb) {
+  error_message_callback_ = cb;
+}
+
+void WebGraphicsContext3DImpl::setContextLostCallback(
+    WebGraphicsContext3D::WebGraphicsContextLostCallback* cb) {
+  context_lost_callback_ = cb;
+}
+
+DELEGATE_TO_GL_5(texImageIOSurface2DCHROMIUM, TexImageIOSurface2DCHROMIUM,
+                 WGC3Denum, WGC3Dint, WGC3Dint, WGC3Duint, WGC3Duint)
+
+DELEGATE_TO_GL_5(texStorage2DEXT, TexStorage2DEXT,
+                 WGC3Denum, WGC3Dint, WGC3Duint, WGC3Dint, WGC3Dint)
+
+WebGLId WebGraphicsContext3DImpl::createQueryEXT() {
+  GLuint o;
+  gl_->GenQueriesEXT(1, &o);
+  return o;
+}
+
+void WebGraphicsContext3DImpl::deleteQueryEXT(
+    WebGLId query) {
+  gl_->DeleteQueriesEXT(1, &query);
+}
+
+DELEGATE_TO_GL_1R(isQueryEXT, IsQueryEXT, WebGLId, WGC3Dboolean)
+DELEGATE_TO_GL_2(beginQueryEXT, BeginQueryEXT, WGC3Denum, WebGLId)
+DELEGATE_TO_GL_1(endQueryEXT, EndQueryEXT, WGC3Denum)
+DELEGATE_TO_GL_3(getQueryivEXT, GetQueryivEXT, WGC3Denum, WGC3Denum, WGC3Dint*)
+DELEGATE_TO_GL_3(getQueryObjectuivEXT, GetQueryObjectuivEXT,
+                 WebGLId, WGC3Denum, WGC3Duint*)
+
+DELEGATE_TO_GL_6(copyTextureCHROMIUM, CopyTextureCHROMIUM,  WGC3Denum,
+                 WebGLId, WebGLId, WGC3Dint, WGC3Denum, WGC3Denum);
+
+DELEGATE_TO_GL_3(bindUniformLocationCHROMIUM, BindUniformLocationCHROMIUM,
+                 WebGLId, WGC3Dint, const WGC3Dchar*)
+
+void WebGraphicsContext3DImpl::shallowFlushCHROMIUM() {
+  flush_id_ = GenFlushID();
+  gl_->ShallowFlushCHROMIUM();
+}
+
+void WebGraphicsContext3DImpl::shallowFinishCHROMIUM() {
+  flush_id_ = GenFlushID();
+  gl_->ShallowFinishCHROMIUM();
+}
+
+DELEGATE_TO_GL_1(waitSyncPoint, WaitSyncPointCHROMIUM, GLuint)
+
+void WebGraphicsContext3DImpl::loseContextCHROMIUM(
+    WGC3Denum current, WGC3Denum other) {
+  gl_->LoseContextCHROMIUM(current, other);
+  gl_->Flush();
+}
+
+DELEGATE_TO_GL_1(genMailboxCHROMIUM, GenMailboxCHROMIUM, WGC3Dbyte*)
+DELEGATE_TO_GL_2(produceTextureCHROMIUM, ProduceTextureCHROMIUM,
+                 WGC3Denum, const WGC3Dbyte*)
+DELEGATE_TO_GL_3(produceTextureDirectCHROMIUM, ProduceTextureDirectCHROMIUM,
+                 WebGLId, WGC3Denum, const WGC3Dbyte*)
+DELEGATE_TO_GL_2(consumeTextureCHROMIUM, ConsumeTextureCHROMIUM,
+                 WGC3Denum, const WGC3Dbyte*)
+DELEGATE_TO_GL_2R(createAndConsumeTextureCHROMIUM,
+                  CreateAndConsumeTextureCHROMIUM,
+                  WGC3Denum, const WGC3Dbyte*, WebGLId)
+
+DELEGATE_TO_GL_2(genValuebuffersCHROMIUM,
+                 GenValuebuffersCHROMIUM,
+                 WGC3Dsizei,
+                 WebGLId*);
+
+WebGLId WebGraphicsContext3DImpl::createValuebufferCHROMIUM() {
+  GLuint o;
+  gl_->GenValuebuffersCHROMIUM(1, &o);
+  return o;
+}
+
+DELEGATE_TO_GL_2(deleteValuebuffersCHROMIUM,
+                 DeleteValuebuffersCHROMIUM,
+                 WGC3Dsizei,
+                 WebGLId*);
+
+void WebGraphicsContext3DImpl::deleteValuebufferCHROMIUM(WebGLId valuebuffer) {
+  gl_->DeleteValuebuffersCHROMIUM(1, &valuebuffer);
+}
+
+DELEGATE_TO_GL_1RB(isValuebufferCHROMIUM,
+                   IsValuebufferCHROMIUM,
+                   WebGLId,
+                   WGC3Dboolean)
+DELEGATE_TO_GL_2(bindValuebufferCHROMIUM,
+                 BindValuebufferCHROMIUM,
+                 WGC3Denum,
+                 WebGLId)
+DELEGATE_TO_GL_2(subscribeValueCHROMIUM,
+                 SubscribeValueCHROMIUM,
+                 WGC3Denum,
+                 WGC3Denum);
+DELEGATE_TO_GL_1(populateSubscribedValuesCHROMIUM,
+                 PopulateSubscribedValuesCHROMIUM,
+                 WGC3Denum);
+DELEGATE_TO_GL_3(uniformValuebufferCHROMIUM,
+                 UniformValuebufferCHROMIUM,
+                 WGC3Dint,
+                 WGC3Denum,
+                 WGC3Denum);
+
+void WebGraphicsContext3DImpl::insertEventMarkerEXT(
+    const WGC3Dchar* marker) {
+  gl_->InsertEventMarkerEXT(0, marker);
+}
+
+void WebGraphicsContext3DImpl::pushGroupMarkerEXT(
+    const WGC3Dchar* marker) {
+  gl_->PushGroupMarkerEXT(0, marker);
+}
+
+DELEGATE_TO_GL(popGroupMarkerEXT, PopGroupMarkerEXT);
+
+WebGLId WebGraphicsContext3DImpl::createVertexArrayOES() {
+  GLuint array;
+  gl_->GenVertexArraysOES(1, &array);
+  return array;
+}
+
+void WebGraphicsContext3DImpl::deleteVertexArrayOES(
+    WebGLId array) {
+  gl_->DeleteVertexArraysOES(1, &array);
+}
+
+DELEGATE_TO_GL_1R(isVertexArrayOES, IsVertexArrayOES, WebGLId, WGC3Dboolean)
+DELEGATE_TO_GL_1(bindVertexArrayOES, BindVertexArrayOES, WebGLId)
+
+DELEGATE_TO_GL_2(bindTexImage2DCHROMIUM, BindTexImage2DCHROMIUM,
+                 WGC3Denum, WGC3Dint)
+DELEGATE_TO_GL_2(releaseTexImage2DCHROMIUM, ReleaseTexImage2DCHROMIUM,
+                 WGC3Denum, WGC3Dint)
+
+DELEGATE_TO_GL_2R(mapBufferCHROMIUM, MapBufferCHROMIUM, WGC3Denum, WGC3Denum,
+                  void*)
+DELEGATE_TO_GL_1R(unmapBufferCHROMIUM, UnmapBufferCHROMIUM, WGC3Denum,
+                  WGC3Dboolean)
+
+DELEGATE_TO_GL_9(asyncTexImage2DCHROMIUM, AsyncTexImage2DCHROMIUM, WGC3Denum,
+                 WGC3Dint, WGC3Denum, WGC3Dsizei, WGC3Dsizei, WGC3Dint,
+                 WGC3Denum, WGC3Denum, const void*)
+DELEGATE_TO_GL_9(asyncTexSubImage2DCHROMIUM, AsyncTexSubImage2DCHROMIUM,
+                 WGC3Denum, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dsizei,
+                 WGC3Dsizei, WGC3Denum, WGC3Denum, const void*)
+
+DELEGATE_TO_GL_1(waitAsyncTexImage2DCHROMIUM, WaitAsyncTexImage2DCHROMIUM,
+                 WGC3Denum)
+
+DELEGATE_TO_GL_2(drawBuffersEXT, DrawBuffersEXT, WGC3Dsizei, const WGC3Denum*)
+
+DELEGATE_TO_GL_4(drawArraysInstancedANGLE, DrawArraysInstancedANGLE, WGC3Denum,
+                 WGC3Dint, WGC3Dsizei, WGC3Dsizei)
+
+void WebGraphicsContext3DImpl::drawElementsInstancedANGLE(
+    WGC3Denum mode,
+    WGC3Dsizei count,
+    WGC3Denum type,
+    WGC3Dintptr offset,
+    WGC3Dsizei primcount) {
+  gl_->DrawElementsInstancedANGLE(
+      mode, count, type,
+      reinterpret_cast<void*>(static_cast<intptr_t>(offset)), primcount);
+}
+
+DELEGATE_TO_GL_2(vertexAttribDivisorANGLE, VertexAttribDivisorANGLE, WGC3Duint,
+                 WGC3Duint)
+
+DELEGATE_TO_GL_4R(createGpuMemoryBufferImageCHROMIUM,
+                  CreateGpuMemoryBufferImageCHROMIUM,
+                  WGC3Dsizei,
+                  WGC3Dsizei,
+                  WGC3Denum,
+                  WGC3Denum,
+                  WGC3Duint);
+
+DELEGATE_TO_GL_1(destroyImageCHROMIUM, DestroyImageCHROMIUM, WGC3Duint);
+
+DELEGATE_TO_GL_6(framebufferTexture2DMultisampleEXT,
+                 FramebufferTexture2DMultisampleEXT,
+                 WGC3Denum, WGC3Denum, WGC3Denum, WebGLId, WGC3Dint, WGC3Dsizei)
+
+DELEGATE_TO_GL_5(renderbufferStorageMultisampleEXT,
+                 RenderbufferStorageMultisampleEXT, WGC3Denum, WGC3Dsizei,
+                 WGC3Denum, WGC3Dsizei, WGC3Dsizei)
+
+GrGLInterface* WebGraphicsContext3DImpl::createGrGLInterface() {
+  return skia_bindings::CreateCommandBufferSkiaGLBinding();
+}
+
+::gpu::gles2::GLES2ImplementationErrorMessageCallback*
+    WebGraphicsContext3DImpl::getErrorMessageCallback() {
+  if (!client_error_message_callback_) {
+    client_error_message_callback_.reset(
+        new WebGraphicsContext3DErrorMessageCallback(this));
+  }
+  return client_error_message_callback_.get();
+}
+
+void WebGraphicsContext3DImpl::OnErrorMessage(
+    const std::string& message, int id) {
+  if (error_message_callback_) {
+    blink::WebString str = blink::WebString::fromUTF8(message.c_str());
+    error_message_callback_->onErrorMessage(str, id);
+  }
+}
+
+// TODO(bajones): Look into removing these functions from the blink interface
+void WebGraphicsContext3DImpl::prepareTexture() {
+  NOTREACHED();
+}
+
+void WebGraphicsContext3DImpl::postSubBufferCHROMIUM(
+    int x, int y, int width, int height) {
+  NOTREACHED();
+}
+
+void WebGraphicsContext3DImpl::setVisibilityCHROMIUM(
+    bool visible) {
+  NOTREACHED();
+}
+
+void WebGraphicsContext3DImpl::copyTextureToParentTextureCHROMIUM(
+    WebGLId texture, WebGLId parentTexture) {
+  NOTIMPLEMENTED();
+}
+
+void WebGraphicsContext3DImpl::releaseShaderCompiler() {
+}
+
+// static
+void WebGraphicsContext3DImpl::ConvertAttributes(
+    const blink::WebGraphicsContext3D::Attributes& attributes,
+    ::gpu::gles2::ContextCreationAttribHelper* output_attribs) {
+  output_attribs->alpha_size = attributes.alpha ? 8 : 0;
+  output_attribs->depth_size = attributes.depth ? 24 : 0;
+  output_attribs->stencil_size = attributes.stencil ? 8 : 0;
+  output_attribs->samples = attributes.antialias ? 4 : 0;
+  output_attribs->sample_buffers = attributes.antialias ? 1 : 0;
+  output_attribs->fail_if_major_perf_caveat =
+      attributes.failIfMajorPerformanceCaveat;
+  output_attribs->bind_generates_resource = false;
+}
+
+}  // namespace gpu_blink