Move Extension Location and Type enums to Manifest, and move InstallWarning to its own file.

chrome/common/extensions/extension_test_util.cc

Index: chrome/common/extensions/extension_test_util.cc
diff --git a/chrome/common/extensions/extension_test_util.cc b/chrome/common/extensions/extension_test_util.cc
index 5dfa9a64535f7444f5b61ac11993b20c2e7a2854..97f9d96969fecff013ffcb9a6a3589a838e541bc 100644
--- a/chrome/common/extensions/extension_test_util.cc
+++ b/chrome/common/extensions/extension_test_util.cc
@@ -26,7 +26,7 @@ scoped_refptr<Extension> CreateExtensionWithID(std::string id) {
   values.SetString(extension_manifest_keys::kName, "test");
   values.SetString(extension_manifest_keys::kVersion, "0.1");
   std::string error;
-  return Extension::Create(FilePath(), Extension::INTERNAL, values,
+  return Extension::Create(FilePath(), extensions::Manifest::INTERNAL, values,
                            Extension::NO_FLAGS, id, &error);
 }