Fix global dumps to be dumped only when shared memory is actually used

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 f60d7772a36e2801ac12d51dd3eab312cc48485e..c02f3a04618775d248230c959f2cef3f66301dbd 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -455,11 +455,13 @@ bool GLES2Implementation::OnMemoryDump(
   if (args.level_of_detail != MemoryDumpLevelOfDetail::BACKGROUND) {
     dump->AddScalar("free_size", MemoryAllocatorDump::kUnitsBytes,
                     transfer_buffer_->GetFreeSize());
-    auto guid = GetBufferGUIDForTracing(tracing_process_id,
-                                        transfer_buffer_->GetShmId());
-    const int kImportance = 2;
-    pmd->CreateSharedGlobalAllocatorDump(guid);
-    pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
+    if (transfer_buffer_->is_shared()) {
+      auto guid = GetBufferGUIDForTracing(tracing_process_id,
+                                          transfer_buffer_->GetShmId());
+      const int kImportance = 2;
+      pmd->CreateSharedGlobalAllocatorDump(guid);
+      pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
+    }
   }
 
   return true;