memory-infra: Fill the memory dump callback result (1/2)

base/trace_event/memory_allocator_dump.h

Index: base/trace_event/memory_allocator_dump.h
diff --git a/base/trace_event/memory_allocator_dump.h b/base/trace_event/memory_allocator_dump.h
index c781f071bba40ab08c25dcb18ec1f59fc1b1fc12..99ff114e5c78a28dedb2667e7c3a1b95a1726f82 100644
--- a/base/trace_event/memory_allocator_dump.h
+++ b/base/trace_event/memory_allocator_dump.h
@@ -11,6 +11,7 @@
 #include <string>
 
 #include "base/base_export.h"
+#include "base/gtest_prod_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/trace_event/memory_allocator_dump_guid.h"
@@ -85,11 +86,21 @@ class BASE_EXPORT MemoryAllocatorDump {
   TracedValue* attributes_for_testing() const { return attributes_.get(); }
 
  private:
+  // TODO(hjd): Transitional until we send the full PMD. See crbug.com/704203
+  friend class MemoryDumpManager;
+  FRIEND_TEST_ALL_PREFIXES(MemoryAllocatorDumpTest, GetSize);
+
+  // Get the size for this dump.
+  // The size is the value set with AddScalar(kNameSize, kUnitsBytes, size);
+  // TODO(hjd): Transitional until we send the full PMD. See crbug.com/704203
+  uint64_t GetSize() const { return size_; };
+
   const std::string absolute_name_;
   ProcessMemoryDump* const process_memory_dump_;  // Not owned (PMD owns this).
   std::unique_ptr<TracedValue> attributes_;
   MemoryAllocatorDumpGuid guid_;
   int flags_;  // See enum Flags.
+  uint64_t size_;
 
   // A local buffer for Sprintf conversion on fastpath. Avoids allocating
   // temporary strings on each AddScalar() call.