[memory-infra] Add API to ProcessMemoryDump to create ownership edges for base::SharedMemory

base/trace_event/memory_allocator_dump_guid.h

Index: base/trace_event/memory_allocator_dump_guid.h
diff --git a/base/trace_event/memory_allocator_dump_guid.h b/base/trace_event/memory_allocator_dump_guid.h
index 2a420a2af7e9fb5afb9d2e9e4d2b10bcff4df98c..32bbc6b527ff4bf2438d57826dbf58f53d5709c5 100644
--- a/base/trace_event/memory_allocator_dump_guid.h
+++ b/base/trace_event/memory_allocator_dump_guid.h
@@ -16,6 +16,11 @@ namespace trace_event {
 
 class BASE_EXPORT MemoryAllocatorDumpGuid {
  public:
+  // If the clients of base::SharedMemory should use the global dump guid(s)
+  // created by SharedMemoryTracker.
+  static bool UseSharedMemoryBasedGUIDs();
+  static void SetUseSharedMemoryBasedGUIDsForTesting();
+
   MemoryAllocatorDumpGuid();
   explicit MemoryAllocatorDumpGuid(uint64_t guid);