Add UMA histograms for more detailed latency tracking on the CRD host.

remoting/protocol/performance_tracker.h

Index: remoting/protocol/performance_tracker.h
diff --git a/remoting/protocol/performance_tracker.h b/remoting/protocol/performance_tracker.h
index af9e4c7b2f3606085c1cb532a0c9ae286742ea01..f1d9aa023d9f1c31dcca4736baf07010bdca6f55 100644
--- a/remoting/protocol/performance_tracker.h
+++ b/remoting/protocol/performance_tracker.h
@@ -22,7 +22,7 @@ class PerformanceTracker {
  public:
   // Callback that updates UMA custom counts or custom times histograms.
   typedef base::Callback<void(const std::string& histogram_name,
-                              int64 value,
+                              int64_t value,
                               int histogram_min,
                               int histogram_max,
                               int histogram_buckets)>
@@ -30,7 +30,7 @@ class PerformanceTracker {
 
   // Callback that updates UMA enumeration histograms.
   typedef base::Callback<
-      void(const std::string& histogram_name, int64 value, int histogram_max)>
+      void(const std::string& histogram_name, int64_t value, int histogram_max)>
       UpdateUmaEnumHistogramCallback;
 
   PerformanceTracker();