Update from https://crrev.com/311076

gpu/tools/compositor_model_bench/compositor_model_bench.cc

Index: gpu/tools/compositor_model_bench/compositor_model_bench.cc
diff --git a/gpu/tools/compositor_model_bench/compositor_model_bench.cc b/gpu/tools/compositor_model_bench/compositor_model_bench.cc
index 804239215eea018af359fd6e445bb54892e79d76..1160ff70891e85597b35b9f794998f23d5a776a0 100644
--- a/gpu/tools/compositor_model_bench/compositor_model_bench.cc
+++ b/gpu/tools/compositor_model_bench/compositor_model_bench.cc
@@ -86,7 +86,7 @@ class Simulator {
     // If the name of the file wasn't ASCII, this will give an empty simulation
     //  name, but that's not really harmful (we'll still warn about it though.)
     spec.simulation_name = path.BaseName().RemoveExtension().MaybeAsASCII();
-    if (spec.simulation_name == "") {
+    if (spec.simulation_name.empty()) {
       LOG(WARNING) << "Simulation for path " << path.LossyDisplayName() <<
         " will have a blank simulation name, since the file name isn't ASCII";
     }