Add more files to content_unittests.

content/test/content_test_suite.h

Index: content/test/content_test_suite.h
diff --git a/content/test/content_test_suite.h b/content/test/content_test_suite.h
index e6afe29a8d8768e1a981d2dd3416ca3458924370..6a2b94821cb0fb9c293e5e227a4a6afb3d12963a 100644
--- a/content/test/content_test_suite.h
+++ b/content/test/content_test_suite.h
@@ -8,6 +8,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/test/test_suite.h"
+#include "base/win/scoped_com_initializer.h"
 
 class ContentTestSuite : public base::TestSuite {
  public:
@@ -17,6 +18,9 @@ class ContentTestSuite : public base::TestSuite {
  protected:
   virtual void Initialize() OVERRIDE;
 
+ private:
+  base::win::ScopedCOMInitializer com_initializer_;
+
   DISALLOW_COPY_AND_ASSIGN(ContentTestSuite);
 };