Move 'theme' parsing out of Extension class

chrome/common/extensions/unpacker_unittest.cc

Index: chrome/common/extensions/unpacker_unittest.cc
diff --git a/chrome/common/extensions/unpacker_unittest.cc b/chrome/common/extensions/unpacker_unittest.cc
index bbb8b55a6a6a88dbf524cb883e09008b860eaf6d..ccd811ad60c8290ee2ee4c62e981ee6d77ce15d2 100644
--- a/chrome/common/extensions/unpacker_unittest.cc
+++ b/chrome/common/extensions/unpacker_unittest.cc
@@ -11,6 +11,8 @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
+#include "chrome/common/extensions/manifest_handler.h"
+#include "chrome/common/extensions/theme_handler.h"
 #include "chrome/common/extensions/unpacker.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ -29,6 +31,12 @@ public:
     LOG(WARNING) << temp_dir_.Delete();
   }
 
+  virtual void SetUp() OVERRIDE {
+    testing::Test::SetUp();
+    extensions::ManifestHandler::Register(keys::kTheme,
+                                          new extensions::ThemeHandler);
+  }
+
   void SetupUnpacker(const std::string& crx_name) {
     FilePath original_path;
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &original_path));