aura: Clean up compositor initialization/destruction.

ui/compositor/test/test_suite.cc

Index: ui/compositor/test/test_suite.cc
diff --git a/ui/compositor/test/test_suite.cc b/ui/compositor/test/test_suite.cc
index 58329f20bd263328be51a0935db1edee7abb1f88..3f89ccee9bf0fd4c3e77a3c12f2783f7fd1ff5ac 100644
--- a/ui/compositor/test/test_suite.cc
+++ b/ui/compositor/test/test_suite.cc
@@ -28,19 +28,15 @@ void CompositorTestSuite::Initialize() {
 #if defined(USE_X11)
   XInitThreads();
 #endif
-#if defined(OS_LINUX)
-  gfx::InitializeGLBindings(gfx::kGLImplementationOSMesaGL);
-#endif
+  CHECK(gfx::InitializeGLBindings(gfx::kGLImplementationOSMesaGL));
   base::TestSuite::Initialize();
 
   gfx::RegisterPathProvider();
 
   message_loop_.reset(new base::MessageLoop(base::MessageLoop::TYPE_UI));
-  Compositor::Initialize();
 }
 
 void CompositorTestSuite::Shutdown() {
-  Compositor::Terminate();
   message_loop_.reset();
 
   base::TestSuite::Shutdown();