Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/platform/web_process_memory_dump.h

Index: third_party/WebKit/Source/platform/web_process_memory_dump.h
diff --git a/third_party/WebKit/Source/platform/web_process_memory_dump.h b/third_party/WebKit/Source/platform/web_process_memory_dump.h
index ed7310fd17575b08315b7b85cb236dfcc14ef69a..5fb92cda831663fdd1f243ae0333b9dc871ae399 100644
--- a/third_party/WebKit/Source/platform/web_process_memory_dump.h
+++ b/third_party/WebKit/Source/platform/web_process_memory_dump.h
@@ -12,7 +12,9 @@
 #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>
@@ -156,7 +158,7 @@ class PLATFORM_EXPORT WebProcessMemoryDump final {
   // 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_;