Fix crash caused by concurrent access to framebuffer_combo_complete_map_.

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 f32792fb49058fb7cb3254a861008e6dc09372fb..ea4fe25171504a31d21e02ab0a1c4090798ac884 100644
--- a/gpu/command_buffer/tests/gl_manager.cc
+++ b/gpu/command_buffer/tests/gl_manager.cc
@@ -275,14 +275,10 @@ void GLManager::InitializeWithCommandLine(const GLManager::Options& options,
     scoped_refptr<gles2::FeatureInfo> feature_info;
     if (command_line)
       feature_info = new gles2::FeatureInfo(*command_line);
-    context_group =
-        new gles2::ContextGroup(mailbox_manager_.get(),
-                                NULL,
-                                new gpu::gles2::ShaderTranslatorCache,
-                                feature_info,
-                                NULL,
-                                NULL,
-                                options.bind_generates_resource);
+    context_group = new gles2::ContextGroup(
+        mailbox_manager_.get(), NULL, new gpu::gles2::ShaderTranslatorCache,
+        new gpu::gles2::FramebufferCompletenessCache, feature_info, NULL, NULL,
+        options.bind_generates_resource);
   }
 
   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group));