VR: Loading DD controller model after GL is initialized

chrome/browser/android/vr_shell/vr_shell_renderer.cc

 // Copyright 2016 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 "chrome/browser/android/vr_shell/vr_shell_renderer.h"
 
 #include <math.h>
 #include <algorithm>
 #include <string>
 
 #include "base/memory/ptr_util.h"
+#include "base/trace_event/trace_event.h"
 #include "chrome/browser/android/vr_shell/vr_gl_util.h"
 
 namespace {
 
 static constexpr float kHalfSize = 0.5f;
 /* clang-format off */
 static constexpr float kTextureQuadVertices[30] = {
     //       x           y     z,    u,    v
     -kHalfSize,  kHalfSize, 0.0f, 0.0f, 0.0f,
     -kHalfSize, -kHalfSize, 0.0f, 0.0f, 1.0f,
@@ skipping 567 matching lines @@
       texture_handles_(VrControllerModel::STATE_COUNT) {
   model_view_proj_matrix_handle_ =
       glGetUniformLocation(program_handle_, "u_ModelViewProjMatrix");
   tex_uniform_handle_ = glGetUniformLocation(program_handle_, "u_Texture");
   opacity_handle_ = glGetUniformLocation(program_handle_, "u_Opacity");
 }
 
 ControllerRenderer::~ControllerRenderer() = default;
 
 void ControllerRenderer::SetUp(std::unique_ptr<VrControllerModel> model) {
+  TRACE_EVENT0("gpu", "ControllerRenderer::SetUp");
   glGenBuffersARB(1, &indices_buffer_);
   glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indices_buffer_);
   glBufferData(GL_ELEMENT_ARRAY_BUFFER, model->IndicesBufferSize(),
                model->IndicesBuffer(), GL_STATIC_DRAW);
 
   glGenBuffersARB(1, &vertex_buffer_);
   glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer_);
   glBufferData(GL_ARRAY_BUFFER, model->ElementsBufferSize(),
                model->ElementsBuffer(), GL_STATIC_DRAW);
 
@@ skipping 241 matching lines @@
 GradientGridRenderer* VrShellRenderer::GetGradientGridRenderer() {
   Flush();
   return gradient_grid_renderer_.get();
 }
 
 void VrShellRenderer::Flush() {
   textured_quad_renderer_->Flush();
 }
 
 }  // namespace vr_shell