Limit the size of latency info storage

cc/surfaces/display.cc

Index: cc/surfaces/display.cc
diff --git a/cc/surfaces/display.cc b/cc/surfaces/display.cc
index a9c5358eab4a693ee0e2fa439e19856e968ef6a1..ead51b6cd0c3fc22f92994b328dd8c89213244a0 100644
--- a/cc/surfaces/display.cc
+++ b/cc/surfaces/display.cc
@@ -340,9 +340,15 @@ bool Display::DrawAndSwap() {
     if (have_damage && !size_matches)
       aggregator_->SetFullDamageForSurface(current_surface_id_);
     TRACE_EVENT_INSTANT0("cc", "Swap skipped.", TRACE_EVENT_SCOPE_THREAD);
-    stored_latency_info_.insert(stored_latency_info_.end(),
-                                frame.metadata.latency_info.begin(),
-                                frame.metadata.latency_info.end());
+
+    // Do not store more that the allowed size.
+    if (ui::LatencyInfo::Verify(frame.metadata.latency_info,

[tdresser, 2017/06/30 17:28:51]

Should we add a test for this?

[Navid Zolghadr, 2017/07/04 16:25:46]

I had to add a test API to the Display class. It was already one there. So I
thought that would be fine.

+                                "Display::DrawAndSwap")) {
+      stored_latency_info_.insert(stored_latency_info_.end(),
+                                  frame.metadata.latency_info.begin(),
+                                  frame.metadata.latency_info.end());
+    }
+
     if (scheduler_) {
       scheduler_->DidSwapBuffers();
       scheduler_->DidReceiveSwapBuffersAck();