Reuse GLFenceNV when an existing CommandsCompletedQuery is reused

gpu/command_buffer/service/query_manager.cc

Index: gpu/command_buffer/service/query_manager.cc
diff --git a/gpu/command_buffer/service/query_manager.cc b/gpu/command_buffer/service/query_manager.cc
index a1938e51384922444bc13f93d9d3460849af3a48..c2cd4ec976beb424fff40b026e7fda4dc4c49b53 100644
--- a/gpu/command_buffer/service/query_manager.cc
+++ b/gpu/command_buffer/service/query_manager.cc
@@ -504,7 +504,12 @@ void CommandsCompletedQuery::Resume() {
 }
 
 bool CommandsCompletedQuery::End(base::subtle::Atomic32 submit_count) {
-  fence_.reset(gfx::GLFence::Create());
+  if (fence_ && fence_->ResetSupported()) {
+    fence_->ResetState();
+  }
+  else {
+    fence_.reset(gfx::GLFence::Create());
+  }
   DCHECK(fence_);
   return AddToPendingQueue(submit_count);
 }