ui: No more TestCompositor. Use NullDraw contexts in unit tests.

ui/views/run_all_unittests.cc

Index: ui/views/run_all_unittests.cc
diff --git a/ui/views/run_all_unittests.cc b/ui/views/run_all_unittests.cc
index 499d339c5f96c2f9a63bfbd7bae8f07aeaa54623..63b1fd551c03cb5954e035fa052939fae7423b42 100644
--- a/ui/views/run_all_unittests.cc
+++ b/ui/views/run_all_unittests.cc
@@ -10,6 +10,7 @@
 #include "base/test/test_suite.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
+#include "ui/gl/gl_surface.h"
 
 class ViewTestSuite : public base::TestSuite {
  public:
@@ -18,6 +19,7 @@ class ViewTestSuite : public base::TestSuite {
  protected:
   virtual void Initialize() OVERRIDE {
     base::TestSuite::Initialize();
+    gfx::GLSurface::InitializeOneOffForTests();
     ui::RegisterPathProvider();
 
     base::FilePath pak_dir;