Fix few compilation errors on Windows in media/ during Windows GN build.

media/mojo/services/mojo_cdm.h

Index: media/mojo/services/mojo_cdm.h
diff --git a/media/mojo/services/mojo_cdm.h b/media/mojo/services/mojo_cdm.h
index 40837282210252be77281045e99d2c9ed53f57c8..64a71da7d562160e7b773ff08f2f78d76a3a814d 100644
--- a/media/mojo/services/mojo_cdm.h
+++ b/media/mojo/services/mojo_cdm.h
@@ -74,10 +74,18 @@ class MojoCdm : public MediaKeys, public mojo::ContentDecryptionModuleClient {
                                  int64_t new_expiry_time_usec) final;
 
   // Callbacks to handle CDM promises.
+  // We have to inline this method, since MS VS 2013 compiler fails to compile
+  // it when this method is not inlined. It fails with error C2244
+  // "unable to match function definition to an existing declaration".
   template <typename... T>
   void OnPromiseResult(scoped_ptr<CdmPromiseTemplate<T...>> promise,
                        mojo::CdmPromiseResultPtr result,
-                       typename MojoTypeTrait<T>::MojoType... args);
+                       typename MojoTypeTrait<T>::MojoType... args) {
+    if (result->success)
+      promise->resolve(args.template To<T>()...);  // See ISO C++03 14.2/4.
+    else
+      RejectPromise(promise.Pass(), result.Pass());
+  }
 
   mojo::ContentDecryptionModulePtr remote_cdm_;