Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/platform/web_process_memory_dump.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 WebProcessMemoryDump_h
 #define WebProcessMemoryDump_h
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/trace_event/heap_profiler_allocation_context.h"
 #include "base/trace_event/memory_dump_request_args.h"
 #include "platform/PlatformExport.h"
 #include "platform/web_memory_allocator_dump.h"
 #include "wtf/HashMap.h"
+#include "wtf/OwnPtr.h"
 #include "wtf/text/WTFString.h"
+
 #include <map>
 #include <memory>
 #include <vector>
 
 class SkTraceMemoryDump;
 
 namespace base {
 class DiscardableMemory;
 namespace trace_event {
 class MemoryAllocatorDump;
@@ skipping 123 matching lines @@
 
   // TODO(ssid): Remove it once this information is added to ProcessMemoryDump.
   base::trace_event::MemoryDumpLevelOfDetail level_of_detail_;
 
   // Reverse index of MemoryAllocatorDump -> WebMemoryAllocatorDump wrapper.
   // By design WebMemoryDumpProvider(s) are not supposed to hold the pointer
   // to the WebProcessMemoryDump passed as argument of the onMemoryDump() call.
   // Those pointers are valid only within the scope of the call and can be
   // safely torn down once the WebProcessMemoryDump itself is destroyed.
   HashMap<base::trace_event::MemoryAllocatorDump*,
-          std::unique_ptr<WebMemoryAllocatorDump>> memory_allocator_dumps_;
+          OwnPtr<WebMemoryAllocatorDump>> memory_allocator_dumps_;
 
   // Stores SkTraceMemoryDump for the current ProcessMemoryDump.
   std::vector<std::unique_ptr<skia::SkiaTraceMemoryDumpImpl>> sk_trace_dump_list_;
 
   DISALLOW_COPY_AND_ASSIGN(WebProcessMemoryDump);
 };
 
 }  // namespace blink
 
 #endif  // WebProcessMemoryDump_h