Fix LatencyInfo compile error for ipc fuzzer

ui/events/latency_info.cc

Index: ui/events/latency_info.cc
diff --git a/ui/events/latency_info.cc b/ui/events/latency_info.cc
index fac3199df5b47df4f2f4a1153caacfdbd6bb0ca5..fb7660a4eecf118547a9e6e2632e42a9b34c2c23 100644
--- a/ui/events/latency_info.cc
+++ b/ui/events/latency_info.cc
@@ -138,6 +138,10 @@ LatencyInfo::LatencyInfo()
 LatencyInfo::~LatencyInfo() {
 }
 
+LatencyInfo::LatencyInfo(int64 trace_id, bool terminated)
+    : input_coordinates_size_(0), trace_id_(trace_id), terminated_(terminated) {
+}
+
 bool LatencyInfo::Verify(const std::vector<LatencyInfo>& latency_info,
                          const char* referring_msg) {
   if (latency_info.size() > kMaxLatencyInfoNumber) {