Revert of Move gpu memory calculations to Compositor.

android_webview/browser/aw_render_thread_context_provider.cc

Index: android_webview/browser/aw_render_thread_context_provider.cc
diff --git a/android_webview/browser/aw_render_thread_context_provider.cc b/android_webview/browser/aw_render_thread_context_provider.cc
index 34531a5af42e03e92262a519aec0db818b326d7b..6fa1c01b6bcaf2612cbc8a3402f0a3dbcd8405f6 100644
--- a/android_webview/browser/aw_render_thread_context_provider.cc
+++ b/android_webview/browser/aw_render_thread_context_provider.cc
@@ -171,6 +171,11 @@ void AwRenderThreadContextProvider::SetLostContextCallback(
   lost_context_callback_ = lost_context_callback;
 }
 
+void AwRenderThreadContextProvider::SetMemoryPolicyChangedCallback(
+    const MemoryPolicyChangedCallback& memory_policy_changed_callback) {
+  // There's no memory manager for the in-process implementation.
+}
+
 void AwRenderThreadContextProvider::OnLostContext() {
   DCHECK(main_thread_checker_.CalledOnValidThread());