mojom: Add associative arrays to the mojom language.

mojo/services/clipboard/clipboard_standalone_impl.h

Index: mojo/services/clipboard/clipboard_standalone_impl.h
diff --git a/mojo/services/clipboard/clipboard_standalone_impl.h b/mojo/services/clipboard/clipboard_standalone_impl.h
index 6909c10b5f3dfbc130f0c5c38d6a6e6ed72160f2..c2d33ea2f6522565440853bb5b2cb15b92e56ad9 100644
--- a/mojo/services/clipboard/clipboard_standalone_impl.h
+++ b/mojo/services/clipboard/clipboard_standalone_impl.h
@@ -44,6 +44,11 @@ class ClipboardStandaloneImpl : public InterfaceImpl<mojo::Clipboard> {
                                   mojo::Array<MimeTypePairPtr> data)
       MOJO_OVERRIDE;
 
+  // ITS A FAAAAKKKEEE!
+  virtual void FakeTestMethod(
+      const mojo::Callback<void(mojo::Map<mojo::String,
+                                mojo::String>)>& callback) MOJO_OVERRIDE;
+
  private:
   uint64_t sequence_number_[kNumClipboards];