Revert of Move gpu memory calculations to Compositor.

ui/compositor/test/in_process_context_provider.cc

Index: ui/compositor/test/in_process_context_provider.cc
diff --git a/ui/compositor/test/in_process_context_provider.cc b/ui/compositor/test/in_process_context_provider.cc
index 6b907c413cc8a42204f685cc6e5351b6d05baee7..6104c97ad84f743044f6096ac4d0e99b67bc75f8 100644
--- a/ui/compositor/test/in_process_context_provider.cc
+++ b/ui/compositor/test/in_process_context_provider.cc
@@ -201,6 +201,11 @@ void InProcessContextProvider::SetLostContextCallback(
   lost_context_callback_ = lost_context_callback;
 }
 
+void InProcessContextProvider::SetMemoryPolicyChangedCallback(
+    const MemoryPolicyChangedCallback& memory_policy_changed_callback) {
+  // There's no memory manager for the in-process implementation.
+}
+
 void InProcessContextProvider::OnLostContext() {
   DCHECK(context_thread_checker_.CalledOnValidThread());
   if (!lost_context_callback_.is_null())