Dump MappedMemoryManager memory via GLES2Implementation

gpu/command_buffer/client/gles2_implementation.cc

Index: gpu/command_buffer/client/gles2_implementation.cc
diff --git a/gpu/command_buffer/client/gles2_implementation.cc b/gpu/command_buffer/client/gles2_implementation.cc
index 86abfabd00876bc5243f996c7ab67ac4305d4f24..da5c3dde4ae3b27dcf8f3d22523ff49ce5ad756c 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -436,6 +436,9 @@ bool GLES2Implementation::OnMemoryDump(
   using base::trace_event::MemoryAllocatorDump;
   using base::trace_event::MemoryDumpLevelOfDetail;
 
+  // Dump owned MappedMemoryManager memory as well.
+  mapped_memory_->OnMemoryDump(args, pmd);
+
   if (!transfer_buffer_->HaveBuffer())
     return true;