Improve usefulness of webglcontextcreationerror statusMessage

components/html_viewer/web_graphics_context_3d_command_buffer_impl.cc

 // 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 "components/html_viewer/web_graphics_context_3d_command_buffer_impl.h"
 
 #include "components/html_viewer/blink_basic_type_converters.h"
 #include "components/html_viewer/global_state.h"
 #include "components/mus/public/cpp/context_provider.h"
 #include "components/mus/public/interfaces/gpu.mojom.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "mojo/application/public/cpp/application_impl.h"
 #include "mojo/gles2/gles2_context.h"
 #include "mojo/gpu/mojo_gles2_impl_autogen.h"
 #include "third_party/mojo/src/mojo/public/cpp/environment/environment.h"
 #include "third_party/mojo/src/mojo/public/cpp/system/message_pipe.h"
 
 namespace html_viewer {
 
 // static
 WebGraphicsContext3DCommandBufferImpl*
 WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
     GlobalState* global_state,
     mojo::ApplicationImpl* app,
     const GURL& active_url,
     const blink::WebGraphicsContext3D::Attributes& attributes,
     blink::WebGraphicsContext3D* share_context,
-    blink::WebGLInfo* gl_info) {
+    blink::WebGraphicsContext3D::WebGraphicsInfo* gl_info) {
   const mus::mojom::GpuInfo* gpu_info = global_state->GetGpuInfo();
-  gl_info->vendorId = gpu_info->vendor_id;
-  gl_info->deviceId = gpu_info->device_id;
-  gl_info->vendorInfo = gpu_info->vendor_info.To<blink::WebString>();
-  gl_info->rendererInfo = gpu_info->renderer_info.To<blink::WebString>();
-  gl_info->driverVersion = gpu_info->driver_version.To<blink::WebString>();
-
+  if (gl_info) {
+    gl_info->vendorId = gpu_info->vendor_id;
+    gl_info->deviceId = gpu_info->device_id;
+    gl_info->vendorInfo = gpu_info->vendor_info.To<blink::WebString>();
+    gl_info->rendererInfo = gpu_info->renderer_info.To<blink::WebString>();
+    gl_info->driverVersion = gpu_info->driver_version.To<blink::WebString>();
+  }
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From("mojo:mus");
   mus::mojom::GpuPtr gpu_service;
   app->ConnectToService(request.Pass(), &gpu_service);
   mus::mojom::CommandBufferPtr cb;
   gpu_service->CreateOffscreenGLES2Context(GetProxy(&cb));
   return new WebGraphicsContext3DCommandBufferImpl(
       cb.PassInterface(), active_url, attributes, share_context);
 }
 
@@ skipping 24 matching lines @@
   if (gles2_context_)
     MojoGLES2DestroyContext(gles2_context_);
 }
 
 void WebGraphicsContext3DCommandBufferImpl::ContextLost() {
   if (context_lost_callback_)
     context_lost_callback_->onContextLost();
 }
 
 }  // namespace html_viewer