Revert of Allow std::unordered_*.

content/browser/gpu/browser_gpu_memory_buffer_manager.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_
 #define CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
 
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
-#include "base/hash.h"
 #include "base/macros.h"
 #include "base/trace_event/memory_dump_provider.h"
 #include "content/common/content_export.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
 
 namespace content {
 
 using GpuMemoryBufferConfigurationKey =
     std::pair<gfx::BufferFormat, gfx::BufferUsage>;
 using GpuMemoryBufferConfigurationSet =
     base::hash_set<GpuMemoryBufferConfigurationKey>;
 
 }  // content
 
 namespace BASE_HASH_NAMESPACE {
 
 template <>
 struct hash<content::GpuMemoryBufferConfigurationKey> {
   size_t operator()(const content::GpuMemoryBufferConfigurationKey& key) const {
-    return base::HashInts(static_cast<int>(key.first),
+    return base::HashPair(static_cast<int>(key.first),
                           static_cast<int>(key.second));
   }
 };
 
 }  // namespace BASE_HASH_NAMESPACE
 
 namespace content {
 class GpuProcessHost;
 
 class CONTENT_EXPORT BrowserGpuMemoryBufferManager
@@ skipping 141 matching lines @@
   using BufferMap = base::hash_map<gfx::GpuMemoryBufferId, BufferInfo>;
   using ClientMap = base::hash_map<int, BufferMap>;
   ClientMap clients_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserGpuMemoryBufferManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_