Persist setup metrics and have Chrome report them during UMA upload.

chrome/installer/setup/setup_main.cc

Index: chrome/installer/setup/setup_main.cc
diff --git a/chrome/installer/setup/setup_main.cc b/chrome/installer/setup/setup_main.cc
index 997b8342c8cf71e3ce0fd163d6ca3c9a1f5c2e01..74320c4a4d4ac03ec10d55645e8f74cd2cffa148 100644
--- a/chrome/installer/setup/setup_main.cc
+++ b/chrome/installer/setup/setup_main.cc
@@ -45,6 +45,7 @@
 #include "chrome/installer/setup/install.h"
 #include "chrome/installer/setup/install_worker.h"
 #include "chrome/installer/setup/installer_crash_reporting.h"
+#include "chrome/installer/setup/installer_metrics.h"
 #include "chrome/installer/setup/setup_constants.h"
 #include "chrome/installer/setup/setup_util.h"
 #include "chrome/installer/setup/uninstall.h"
@@ -69,6 +70,7 @@
 #include "chrome/installer/util/self_cleaning_temp_dir.h"
 #include "chrome/installer/util/shell_util.h"
 #include "chrome/installer/util/user_experiment.h"
+#include "chrome/installer/util/util_constants.h"
 
 #if defined(GOOGLE_CHROME_BUILD)
 #include "chrome/installer/util/updating_app_registration_data.h"
@@ -1621,6 +1623,10 @@ int WINAPI wWinMain(HINSTANCE instance, HINSTANCE prev_instance,
   if (!installer::IsProcessorSupported())
     return installer::CPU_NOT_SUPPORTED;
 
+  // Persist histograms so they can be uploaded later.
+  installer::BeginPersistentHistogramStorage(
+      installer::kSetupHistogramAllocatorName);
+
   // The exit manager is in charge of calling the dtors of singletons.
   base::AtExitManager exit_manager;
   base::CommandLine::Init(0, NULL);
@@ -1770,6 +1776,7 @@ int WINAPI wWinMain(HINSTANCE instance, HINSTANCE prev_instance,
     return_code = InstallUtil::GetInstallReturnCode(install_status);
   }
 
+  installer::EndPersistentHistogramStorage(installer_state.target_path());
   VLOG(1) << "Installation complete, returning: " << return_code;
 
   return return_code;