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

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index e7d309db8a964fa061bd76ef29ba3d21fcd78886..e3ed3fd7e081e7a59d4830238fe1bb4219d4ba38 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -13,6 +13,7 @@
 
 #include "base/atomic_sequence_num.h"
 #include "base/macros.h"
+#include "base/memory/shared_memory_tracker.h"
 #include "base/metrics/histogram.h"
 #include "base/numerics/safe_math.h"
 #include "base/stl_util.h"
@@ -2120,10 +2121,12 @@ bool ResourceProvider::OnMemoryDump(
     // Resources may be shared across processes and require a shared GUID to
     // prevent double counting the memory.
     base::trace_event::MemoryAllocatorDumpGuid guid;
+    base::SharedMemoryHandle shared_memory_handle;
     switch (resource.type) {
       case RESOURCE_TYPE_GPU_MEMORY_BUFFER:
         guid = gfx::GetGpuMemoryBufferGUIDForTracing(
             tracing_process_id, resource.gpu_memory_buffer->GetHandle().id);
+        shared_memory_handle = resource.gpu_memory_buffer->GetHandle().handle;
         break;
       case RESOURCE_TYPE_GL_TEXTURE:
         DCHECK(resource.gl_id);
@@ -2135,14 +2138,20 @@ bool ResourceProvider::OnMemoryDump(
       case RESOURCE_TYPE_BITMAP:
         DCHECK(resource.has_shared_bitmap_id);
         guid = GetSharedBitmapGUIDForTracing(resource.shared_bitmap_id);
+        auto* shared_memory = resource.shared_bitmap->shared_memory();
+        if (shared_memory)
+          shared_memory_handle = shared_memory->handle();
         break;
     }
 
     DCHECK(!guid.empty());
 
-    const int kImportance = 2;
-    pmd->CreateSharedGlobalAllocatorDump(guid);
-    pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
+    // const int kImportance = 2;
+    if (shared_memory_handle != base::SharedMemory::NULLHandle()) {
+      // TODO(hajimehoshi): Fix this
+      base::SharedMemoryTracker::AddOwnershipEdges(
+          pmd, guid, shared_memory_handle, total_bytes);
+    }
   }
 
   return true;