Wire up uma histograms with webrtc.

third_party/libjingle/overrides/initialize_module.cc

Index: third_party/libjingle/overrides/initialize_module.cc
diff --git a/third_party/libjingle/overrides/initialize_module.cc b/third_party/libjingle/overrides/initialize_module.cc
index ce11567d4650cb6b4078f3063c60c3a19d274b14..09afbc2aed46b0f5be2233c1c31bc872ccba03d8 100644
--- a/third_party/libjingle/overrides/initialize_module.cc
+++ b/third_party/libjingle/overrides/initialize_module.cc
@@ -38,11 +38,18 @@ cricket::MediaEngineInterface* CreateWebRtcMediaEngine(
 
 void DestroyWebRtcMediaEngine(cricket::MediaEngineInterface* media_engine);
 
-// Define webrtc:field_trial::FindFullName to provide webrtc with a field trial
-// implementation. The implementation is provided by the loader via the
-// InitializeModule.
 namespace {
+// Provide webrtc with a field trial and metrics implementations.
+// The implementations are provided by the loader via the InitializeModule.
+
+// Defines webrtc::field_trial::FindFullName.
 FieldTrialFindFullName g_field_trial_find_ = NULL;
+// Defines webrtc::metrics::RtcFactoryGetCounts.
+RtcHistogramFactoryGetCounts g_factory_get_counts = NULL;
+// Defines webrtc::metrics::RtcFactoryGetEnumeration.
+RtcHistogramFactoryGetEnumeration g_factory_get_enumeration = NULL;
+// Defines webrtc::metrics::RtcAdd.
+RtcHistogramAdd g_histogram_add = NULL;
 }
 
 namespace webrtc {
@@ -51,6 +58,23 @@ std::string FindFullName(const std::string& trial_name) {
   return g_field_trial_find_(trial_name);
 }
 }  // namespace field_trial
+
+namespace metrics {
+Histogram* HistogramFactoryGetCounts(
+    const std::string& name, int min, int max, int bucket_count) {
+  return g_factory_get_counts(name, min, max, bucket_count);
+}
+
+Histogram* HistogramFactoryGetEnumeration(
+    const std::string& name, int boundary) {
+  return g_factory_get_enumeration(name, boundary);
+}
+
+void HistogramAdd(
+    Histogram* histogram_pointer, const std::string& name, int sample) {
+  g_histogram_add(histogram_pointer, name, sample);
+}
+}  // namespace metrics
 }  // namespace webrtc
 
 extern "C" {
@@ -65,6 +89,9 @@ bool InitializeModule(const CommandLine& command_line,
                       DellocateFunction dealloc,
 #endif
                       FieldTrialFindFullName field_trial_find,
+                      RtcHistogramFactoryGetCounts factory_get_counts,
+                      RtcHistogramFactoryGetEnumeration factory_get_enumeration,
+                      RtcHistogramAdd histogram_add,
                       logging::LogMessageHandlerFunction log_handler,
                       webrtc::GetCategoryEnabledPtr trace_get_category_enabled,
                       webrtc::AddTraceEventPtr trace_add_trace_event,
@@ -78,6 +105,9 @@ bool InitializeModule(const CommandLine& command_line,
 #endif
 
   g_field_trial_find_ = field_trial_find;
+  g_factory_get_counts = factory_get_counts;
+  g_factory_get_enumeration = factory_get_enumeration;
+  g_histogram_add = histogram_add;
 
   *create_media_engine = &CreateWebRtcMediaEngine;
   *destroy_media_engine = &DestroyWebRtcMediaEngine;