Re-land: gpu: Add CHROMIUM_sync_query extension.

gpu/command_buffer/service/feature_info.cc

Index: gpu/command_buffer/service/feature_info.cc
diff --git a/gpu/command_buffer/service/feature_info.cc b/gpu/command_buffer/service/feature_info.cc
index 66e6a54eaf159cf2bbea2df0e026c8351eba4f2e..cf70510b41009045924f13c1709ae6b459029e92 100644
--- a/gpu/command_buffer/service/feature_info.cc
+++ b/gpu/command_buffer/service/feature_info.cc
@@ -777,6 +777,9 @@ void FeatureInfo::InitializeFeatures() {
     AddExtensionString("GL_EXT_discard_framebuffer");
     feature_flags_.ext_discard_framebuffer = true;
   }
+
+  if (ui_gl_fence_works)
+    AddExtensionString("GL_CHROMIUM_sync_query");
 }
 
 void FeatureInfo::AddExtensionString(const std::string& str) {