Respect the disabled extension list during binding initialization.

ui/gl/gl_gl_api_implementation.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 "ui/gl/gl_gl_api_implementation.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 193 matching lines @@
     GLenum target, GLsizei samples, GLenum internalformat, GLsizei width,
     GLsizei height) {
   GLenum gl_internal_format = GetInternalFormat(internalformat);
   g_driver_gl.orig_fn.glRenderbufferStorageMultisampleEXTFn(
       target, samples, gl_internal_format, width, height);
 }
 
 }  // anonymous namespace
 
 void DriverGL::InitializeCustomDynamicBindings(GLContext* context) {
-  InitializeDynamicBindings(context);
+  InitializeExtensionBindings(context,
+                              g_real_gl->GetEnabledExtensions(context));
 
   DCHECK(orig_fn.glTexImage2DFn == NULL);
   orig_fn.glTexImage2DFn = fn.glTexImage2DFn;
   fn.glTexImage2DFn =
       reinterpret_cast<glTexImage2DProc>(CustomTexImage2D);
 
   DCHECK(orig_fn.glTexSubImage2DFn == NULL);
   orig_fn.glTexSubImage2DFn = fn.glTexSubImage2DFn;
   fn.glTexSubImage2DFn =
       reinterpret_cast<glTexSubImage2DProc>(CustomTexSubImage2D);
@@ skipping 218 matching lines @@
 const GLubyte* RealGLApi::glGetStringiFn(GLenum name, GLuint index) {
   if (!filtered_exts_str_.empty() && name == GL_EXTENSIONS) {
     if (index >= filtered_exts_.size()) {
       return NULL;
     }
     return reinterpret_cast<const GLubyte*>(filtered_exts_[index].c_str());
   }
   return GLApiBase::glGetStringiFn(name, index);
 }
 
+std::set<std::string> RealGLApi::GetEnabledExtensions(
+    GLContext* context) const {
+  std::set<std::string> enabled_extensions;
+
+  std::vector<std::string> platform_extensions_vec;
+  std::string platform_ext = context->GetExtensions();
+  base::SplitString(platform_ext, ' ', &platform_extensions_vec);
+
+  enabled_extensions.insert(platform_extensions_vec.begin(),
+                            platform_extensions_vec.end());
+
+  for (auto ext : disabled_exts_) {
+    enabled_extensions.erase(ext);
+  }
+
+  return enabled_extensions;
+}
+
 void RealGLApi::glFlushFn() {
   GLApiBase::glFlushFn();
 }
 
 void RealGLApi::glFinishFn() {
   GLApiBase::glFinishFn();
 }
 
 void RealGLApi::InitializeFilteredExtensions() {
   if (!disabled_exts_.empty() && filtered_exts_.empty()) {
@@ skipping 146 matching lines @@
 ScopedSetGLToRealGLApi::ScopedSetGLToRealGLApi()
     : old_gl_api_(GetCurrentGLApi()) {
   SetGLToRealGLApi();
 }
 
 ScopedSetGLToRealGLApi::~ScopedSetGLToRealGLApi() {
   SetGLApi(old_gl_api_);
 }
 
 }  // namespace gfx