Type conversion fixes, ui/ edition.

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 99879082e67c519ee51c8b241573e93d02bf2a5c..7b84c1c5159d38ad75443f1b1dea9f118d20a7d2 100644
--- a/ui/events/latency_info.cc
+++ b/ui/events/latency_info.cc
@@ -114,12 +114,13 @@ scoped_refptr<base::debug::ConvertableToTraceFormat> AsTraceableData(
            latency.latency_components.begin();
        it != latency.latency_components.end(); ++it) {
     base::DictionaryValue* component_info = new base::DictionaryValue();
-    component_info->SetDouble("comp_id", it->first.second);
-    component_info->SetDouble("time", it->second.event_time.ToInternalValue());
+    component_info->SetDouble("comp_id", static_cast<double>(it->first.second));
+    component_info->SetDouble(
+        "time", static_cast<double>(it->second.event_time.ToInternalValue()));
     component_info->SetDouble("count", it->second.event_count);
     record_data->Set(GetComponentName(it->first.first), component_info);
   }
-  record_data->SetDouble("trace_id", latency.trace_id);
+  record_data->SetDouble("trace_id", static_cast<double>(latency.trace_id));
 
   scoped_ptr<base::ListValue> coordinates(new base::ListValue());
   for (size_t i = 0; i < latency.input_coordinates_size; i++) {