2 files changed, 22 insertions, 3 deletions
diff --git a/base/trace_event/process_memory_dump.cc b/base/trace_event/process_memory_dump.cc
index 4390905..7ce117a 100644
--- a/base/trace_event/process_memory_dump.cc
+++ b/base/trace_event/process_memory_dump.cc
@@ -27,12 +27,24 @@ ProcessMemoryDump::~ProcessMemoryDump() {
 MemoryAllocatorDump* ProcessMemoryDump::CreateAllocatorDump(
     const std::string& absolute_name) {
   MemoryAllocatorDump* mad = new MemoryAllocatorDump(absolute_name, this);
-  DCHECK_EQ(0ul, allocator_dumps_.count(absolute_name));
-  allocator_dumps_storage_.push_back(mad);
-  allocator_dumps_[absolute_name] = mad;
+  AddAllocatorDumpInternal(mad);  // Takes ownership of |mad|.
+  return mad;
+}
+
+MemoryAllocatorDump* ProcessMemoryDump::CreateAllocatorDump(
+    const std::string& absolute_name,
+    const MemoryAllocatorDumpGuid& guid) {
+  MemoryAllocatorDump* mad = new MemoryAllocatorDump(absolute_name, this, guid);
+  AddAllocatorDumpInternal(mad);  // Takes ownership of |mad|.
   return mad;
 }
 
+void ProcessMemoryDump::AddAllocatorDumpInternal(MemoryAllocatorDump* mad) {
+  DCHECK_EQ(0ul, allocator_dumps_.count(mad->absolute_name()));
+  allocator_dumps_storage_.push_back(mad);
+  allocator_dumps_[mad->absolute_name()] = mad;
+}
+
 MemoryAllocatorDump* ProcessMemoryDump::GetAllocatorDump(
     const std::string& absolute_name) const {
   auto it = allocator_dumps_.find(absolute_name);
diff --git a/base/trace_event/process_memory_dump.h b/base/trace_event/process_memory_dump.h
index 55d7871..7b1434b 100644
--- a/base/trace_event/process_memory_dump.h
+++ b/base/trace_event/process_memory_dump.h
@@ -78,8 +78,13 @@ class BASE_EXPORT ProcessMemoryDump {
   //       by this provider. It is possible to specify nesting by using a
   //       path-like string (e.g., v8/isolate1/heap1, v8/isolate1/heap2).
   //       Leading or trailing slashes are not allowed.
+  //   guid: an optional identifier, unique among all processes within the
+  //       scope of a global dump. This is only relevant when using
+  //       AddOwnershipEdge(). If omitted, it will be automatically generated.
   // ProcessMemoryDump handles the memory ownership of its MemoryAllocatorDumps.
   MemoryAllocatorDump* CreateAllocatorDump(const std::string& absolute_name);
+  MemoryAllocatorDump* CreateAllocatorDump(const std::string& absolute_name,
+                                           const MemoryAllocatorDumpGuid& guid);
 
   // Looks up a MemoryAllocatorDump given its allocator and heap names, or
   // nullptr if not found.
@@ -108,6 +113,8 @@ class BASE_EXPORT ProcessMemoryDump {
   }
 
  private:
+  void AddAllocatorDumpInternal(MemoryAllocatorDump* mad);
+
   ProcessMemoryTotals process_totals_;
   bool has_process_totals_;