Reland: Refactor ExtensionManifestTest to allow usage in src/extensions

extensions/common/test_util.h

Index: extensions/common/test_util.h
diff --git a/extensions/common/test_util.h b/extensions/common/test_util.h
index 46ac5d08c3f266ee773e84ed878a611a3b16dd74..862c469c1c6ef3dae361e60ea1815d4aa669d5cb 100644
--- a/extensions/common/test_util.h
+++ b/extensions/common/test_util.h
@@ -8,11 +8,6 @@
 #include <string>
 
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace base {
-class DictionaryValue;
-}  // namespace base
 
 namespace extensions {
 class Extension;
@@ -30,12 +25,6 @@ scoped_refptr<Extension> CreateEmptyExtension();
 // Return a very simple extension with a given |id|.
 scoped_refptr<Extension> CreateExtensionWithID(const std::string& id);
 
-// Parses |json| allowing trailing commas and replacing single quotes with
-// double quotes for test readability. If the json fails to parse, calls gtest's
-// ADD_FAILURE and returns an empty dictionary.
-scoped_ptr<base::DictionaryValue> ParseJsonDictionaryWithSingleQuotes(
-    std::string json);
-
 }  // namespace test_util
 }  // namespace extensions