Report some PNaCl UMA earlier, instead of in one chunk at the end.

ppapi/native_client/src/trusted/plugin/pnacl_coordinator.h

Index: ppapi/native_client/src/trusted/plugin/pnacl_coordinator.h
diff --git a/ppapi/native_client/src/trusted/plugin/pnacl_coordinator.h b/ppapi/native_client/src/trusted/plugin/pnacl_coordinator.h
index 321878b9ef7f4c3fa16e17400ced60d91787635a..20b3d85ff044e636015433e881d856b00c2ec8d7 100644
--- a/ppapi/native_client/src/trusted/plugin/pnacl_coordinator.h
+++ b/ppapi/native_client/src/trusted/plugin/pnacl_coordinator.h
@@ -116,6 +116,11 @@ class PnaclCoordinator: public CallbackSource<FileStreamData> {
   // have been compiled.
   pp::CompletionCallback GetCompileProgressCallback(int64_t bytes_compiled);
 
+  // Return a callback that should be notified when an interesting UMA timing
+  // is ready to be reported.
+  pp::CompletionCallback GetUMATimeCallback(const nacl::string& event_name,
+                                            int64_t microsecs);
+
   // Get the last known load progress.
   void GetCurrentProgress(int64_t* bytes_loaded, int64_t* bytes_total);
 
@@ -175,6 +180,10 @@ class PnaclCoordinator: public CallbackSource<FileStreamData> {
   // Invoked when the read descriptor for nexe_file_ is created.
   void NexeReadDidOpen(int32_t pp_error);
 
+  // Invoked when a UMA timing measurement from the translate thread is ready.
+  void DoUMATimeMeasure(
+      int32_t pp_error, const nacl::string& event_name, int64_t microsecs);
+
   // Keeps track of the pp_error upon entry to TranslateFinished,
   // for inspection after cleanup.
   int32_t translate_finish_error_;