[WIP] Add SharedMemoryTracker to dump base::SharedMemory usage

ui/gl/gl_image_shared_memory.cc

Index: ui/gl/gl_image_shared_memory.cc
diff --git a/ui/gl/gl_image_shared_memory.cc b/ui/gl/gl_image_shared_memory.cc
index 03f5aa8700cd58d7f120014b976077fe331172a2..291ad9b2254b5f4b00bc1f9854be1f217cda5521 100644
--- a/ui/gl/gl_image_shared_memory.cc
+++ b/ui/gl/gl_image_shared_memory.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "base/memory/shared_memory.h"
+#include "base/memory/shared_memory_tracker.h"
 #include "base/numerics/safe_math.h"
 #include "base/process/process_handle.h"
 #include "base/sys_info.h"
@@ -88,10 +89,19 @@ void GLImageSharedMemory::OnMemoryDump(
                   base::trace_event::MemoryAllocatorDump::kUnitsBytes,
                   static_cast<uint64_t>(size_in_bytes));
 
-  auto guid =
-      gfx::GetSharedMemoryGUIDForTracing(process_tracing_id, shared_memory_id_);
-  pmd->CreateSharedGlobalAllocatorDump(guid);
-  pmd->AddOwnershipEdge(dump->guid(), guid);
+  if (shared_memory_) {
+    auto name = shared_memory_->handle().GetGUIDNameForTracing();
+    // The same dump name might be already created on single-process mode.
+    base::trace_event::MemoryAllocatorDump* local =
+        pmd->GetOrCreateAllocatorDump(name);
+    pmd->CreateSharedGlobalAllocatorDump(local->guid());
+    pmd->AddOwnershipEdge(dump->guid(), local->guid());
+  } else {
+    auto guid = gfx::GetSharedMemoryGUIDForTracing(process_tracing_id,
+                                                   shared_memory_id_);
+    pmd->CreateSharedGlobalAllocatorDump(guid);
+    pmd->AddOwnershipEdge(dump->guid(), guid);
+  }
 }
 
 }  // namespace gl