Enable ExtensionApiTest.Toolstrip and add additional debug output

chrome/browser/extensions/extension_protocols.cc

Index: chrome/browser/extensions/extension_protocols.cc
diff --git a/chrome/browser/extensions/extension_protocols.cc b/chrome/browser/extensions/extension_protocols.cc
index 3a31b0e7c2b0fb844c3693bd4c1dbd5ab113f50d..3ff9c5100361aa9c76a9480b2b0f4c9af577f24c 100644
--- a/chrome/browser/extensions/extension_protocols.cc
+++ b/chrome/browser/extensions/extension_protocols.cc
@@ -21,8 +21,10 @@ static URLRequestJob* CreateExtensionURLRequestJob(URLRequest* request,
 
   // chrome-extension://extension-id/resource/path.js
   FilePath directory_path = context->GetPathForExtension(request->url().host());
-  if (directory_path.value().empty())
+  if (directory_path.value().empty()) {
+    LOG(WARNING) << "Failed to GetPathForExtension: " << request->url().host();
     return NULL;
+  }
 
   std::string resource = request->url().path();
   FilePath path = Extension::GetResourcePath(directory_path, resource);