Hook ANGLE_request_extension up to the passthrough cmd decoder.

ui/gl/gl_context.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_context.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/cancelable_callback.h"
@@ skipping 120 matching lines @@
     current_gl_->Driver = driver_gl_.get();
     current_gl_->Api = final_api;
     current_gl_->Version = version_info_.get();
 
     static_bindings_initialized_ = true;
   }
 
   return current_gl_.get();
 }
 
+void GLContext::ReinitializeDynamicBindings() {
+  DCHECK(IsCurrent(nullptr));
+  dynamic_bindings_initialized_ = false;
+  InitializeDynamicBindings();
+}
+
 bool GLContext::HasExtension(const char* name) {
   std::string extensions = GetExtensions();
   extensions += " ";
 
   std::string delimited_name(name);
   delimited_name += " ";
 
   return extensions.find(delimited_name) != std::string::npos;
 }
 
@@ skipping 182 matching lines @@
 
 scoped_refptr<GLContext> InitializeGLContext(scoped_refptr<GLContext> context,
                                              GLSurface* compatible_surface,
                                              const GLContextAttribs& attribs) {
   if (!context->Initialize(compatible_surface, attribs))
     return nullptr;
   return context;
 }
 
 }  // namespace gl