content/ui[Android]: Remove ContextProviderFactory.

ui/android/context_provider_factory.cc

Index: ui/android/context_provider_factory.cc
diff --git a/ui/android/context_provider_factory.cc b/ui/android/context_provider_factory.cc
deleted file mode 100644
index 0f1981cc3d3d404bb3a1548f13eae4cfe758621c..0000000000000000000000000000000000000000
--- a/ui/android/context_provider_factory.cc
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/android/context_provider_factory.h"
-
-#include "cc/output/context_provider.h"
-
-namespace ui {
-namespace {
-
-ContextProviderFactory* g_context_provider_factory = nullptr;
-
-}  // namespace
-
-// static
-ContextProviderFactory* ContextProviderFactory::GetInstance() {
-  return g_context_provider_factory;
-}
-
-// static
-void ContextProviderFactory::SetInstance(
-    ContextProviderFactory* context_provider_factory) {
-  DCHECK(!g_context_provider_factory || !context_provider_factory);
-
-  g_context_provider_factory = context_provider_factory;
-}
-
-}  // namespace ui