DevTools: introduce collections shim to be backed by non-wtf in v8_inspector.

third_party/WebKit/Source/platform/inspector_protocol/Collections.h

Index: third_party/WebKit/Source/platform/inspector_protocol/Collections.h
diff --git a/mash/init/public/interfaces/login.mojom b/third_party/WebKit/Source/platform/inspector_protocol/Collections.h
similarity index 61%
copy from mash/init/public/interfaces/login.mojom
copy to third_party/WebKit/Source/platform/inspector_protocol/Collections.h
index 3ea6f10c703ec75106ae469d3ed3ce65d53d89d0..0e3e351ee144369113b16e5e81e25b56a42adf02 100644
--- a/mash/init/public/interfaces/login.mojom
+++ b/third_party/WebKit/Source/platform/inspector_protocol/Collections.h
@@ -2,9 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module mash.init.mojom;
+#ifndef Collections_h
+#define Collections_h
 
-interface Login {
-  LoginAs(uint32 user_id);
-};
+#include "CollectionsWTF.h"
 
+#endif // !defined(Collections_h)