Aura: Make compositor_unittests work with --ui-enable-threaded-compositing

ui/compositor/test/test_compositor_host_linux.cc

 // Copyright (c) 2012 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 "ui/compositor/test/test_compositor_host.h"
 
 #include <X11/Xlib.h>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 67 matching lines @@
   }
   compositor_.reset(new ui::Compositor(this, window_));
   compositor_->SetScaleAndSize(1.0f, bounds_.size());
 }
 
 ui::Compositor* TestCompositorHostLinux::GetCompositor() {
   return compositor_.get();
 }
 
 void TestCompositorHostLinux::ScheduleDraw() {
+  DCHECK(!ui::Compositor::WasInitializedWithThread());
   if (!method_factory_.HasWeakPtrs()) {
     MessageLoopForUI::current()->PostTask(
         FROM_HERE,
         base::Bind(&TestCompositorHostLinux::Draw,
                    method_factory_.GetWeakPtr()));
   }
 }
 
 void TestCompositorHostLinux::Draw() {
   if (compositor_.get())
     compositor_->Draw(false);
 }
 
 // static
 TestCompositorHost* TestCompositorHost::Create(const gfx::Rect& bounds) {
   return new TestCompositorHostLinux(bounds);
 }
 
 }  // namespace ui