Use GpuPreferences to avoid directly accessing switches in gpu related code

gpu/command_buffer/tests/gl_manager.cc

Index: gpu/command_buffer/tests/gl_manager.cc
diff --git a/gpu/command_buffer/tests/gl_manager.cc b/gpu/command_buffer/tests/gl_manager.cc
index 8560399738c74bb183688b6d6899b004be6027af..e71e47a2bb4cf1f539faee981eed44b980ccc7a4 100644
--- a/gpu/command_buffer/tests/gl_manager.cc
+++ b/gpu/command_buffer/tests/gl_manager.cc
@@ -223,7 +223,8 @@ void GLManager::InitializeWithCommandLine(const GLManager::Options& options,
     if (command_line)
       feature_info = new gles2::FeatureInfo(*command_line);
     context_group = new gles2::ContextGroup(
-        mailbox_manager_.get(), NULL, new gpu::gles2::ShaderTranslatorCache,
+        gpu_preferences_, mailbox_manager_.get(), NULL,
+        new gpu::gles2::ShaderTranslatorCache(gpu_preferences_),
         new gpu::gles2::FramebufferCompletenessCache, feature_info, NULL, NULL,
         options.bind_generates_resource);
   }