GLImage::OnMemoryDump Stubs + Some Impls

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 469a6f98d1c242a89e71792eb2c240ceb3d318c8..cb22c7562439363e334692f9c861057039e1c5e2 100644
--- a/ui/gl/gl_image_shared_memory.cc
+++ b/ui/gl/gl_image_shared_memory.cc
@@ -73,6 +73,7 @@ bool GLImageSharedMemory::Initialize(const gfx::GpuMemoryBufferHandle& handle,
 
   DCHECK(!shared_memory_);
   shared_memory_ = duped_shared_memory.Pass();
+  shared_memory_id_ = handle.id;
   return true;
 }
 
@@ -81,4 +82,27 @@ void GLImageSharedMemory::Destroy(bool have_context) {
   shared_memory_.reset();
 }
 
+void GLImageSharedMemory::OnMemoryDump(
+    base::trace_event::ProcessMemoryDump* pmd,
+    uint64_t process_tracing_id,
+    const std::string& dump_name) {
+  size_t size_in_bytes = 0;
+
+  if (shared_memory_) {
+    bool result = SizeInBytes(GetSize(), format(), &size_in_bytes);
+    DCHECK(result);
+  }
+
+  base::trace_event::MemoryAllocatorDump* dump =
+      pmd->CreateAllocatorDump(dump_name);
+  dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                  base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                  static_cast<uint64_t>(size_in_bytes));
+
+  auto guid = gfx::GetGenericSharedMemoryGUIDForTracing(process_tracing_id,
+                                                        shared_memory_id_);
+  pmd->CreateSharedGlobalAllocatorDump(guid);
+  pmd->AddOwnershipEdge(dump->guid(), guid);
+}
+
 }  // namespace gfx