GLImage::OnMemoryDump Stubs + Some Impls

ui/gfx/generic_shared_memory_id.h

 // Copyright 2015 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 UI_GFX_GENERIC_SHARED_MEMORY_ID_H_
 #define UI_GFX_GENERIC_SHARED_MEMORY_ID_H_
 
 #include "base/trace_event/memory_allocator_dump.h"
 #include "ui/gfx/gfx_export.h"
 
@@ skipping 25 matching lines @@
 // Generates GUID which can be used to trace shared memory using its
 // GenericSharedMemoryId.
 GFX_EXPORT base::trace_event::MemoryAllocatorDumpGuid
 GetGenericSharedMemoryGUIDForTracing(
     uint64_t tracing_process_id,
     GenericSharedMemoryId generic_shared_memory_id);
 
 }  // namespace gfx
 
 namespace BASE_HASH_NAMESPACE {
+
 template <>
 struct hash<gfx::GenericSharedMemoryId> {
   size_t operator()(gfx::GenericSharedMemoryId key) const {
     return BASE_HASH_NAMESPACE::hash<int>()(key.id);
   }
 };
 
 template <typename Second>
 struct hash<std::pair<gfx::GenericSharedMemoryId, Second>> {
   size_t operator()(
       const std::pair<gfx::GenericSharedMemoryId, Second>& pair) const {
     return base::HashPair(pair.first.id, pair.second);
   }
 };
 
 }  // namespace BASE_HASH_NAMESPACE
 
 #endif  // UI_GFX_GENERIC_SHARED_MEMORY_ID_H_