Use GpuPreferences to avoid directly accessing switches in gpu related code

gpu/gles2_conform_support/egl/context.cc

 // Copyright (c) 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 "gpu/gles2_conform_support/egl/context.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "gpu/command_buffer/client/gles2_lib.h"
@@ skipping 237 matching lines @@
   scoped_refptr<gpu::TransferBufferManager> transfer_buffer_manager(
       new gpu::TransferBufferManager(nullptr));
   transfer_buffer_manager->Initialize();
 
   scoped_ptr<gpu::CommandBufferService> command_buffer(
       new gpu::CommandBufferService(transfer_buffer_manager.get()));
   if (!command_buffer->Initialize())
     return false;
 
   scoped_refptr<gpu::gles2::ContextGroup> group(new gpu::gles2::ContextGroup(
-      NULL, NULL, new gpu::gles2::ShaderTranslatorCache,
+      display_->gpu_preferences(), NULL, NULL,
+      new gpu::gles2::ShaderTranslatorCache(display_->gpu_preferences()),
       new gpu::gles2::FramebufferCompletenessCache, NULL, NULL, NULL, true));
 
   scoped_ptr<gpu::gles2::GLES2Decoder> decoder(
       gpu::gles2::GLES2Decoder::Create(group.get()));
   if (!decoder.get())
     return false;
 
   scoped_ptr<gpu::GpuScheduler> gpu_scheduler(new gpu::GpuScheduler(
       command_buffer.get(), decoder.get(), decoder.get()));
 
@@ skipping 112 matching lines @@
     return false;
   if (!gl_context_->MakeCurrent(gl_surface)) {
     MarkServiceContextLost();
     return false;
   }
   client_gl_context_->Flush();
   return true;
 }
 
 }  // namespace egl