Add a metrics extensions API....

chrome/browser/extensions/extension_apitest.cc

Index: chrome/browser/extensions/extension_apitest.cc
===================================================================
--- chrome/browser/extensions/extension_apitest.cc	(revision 40111)
+++ chrome/browser/extensions/extension_apitest.cc	(working copy)
@@ -7,6 +7,7 @@
 #include "chrome/browser/browser.h"
 #include "chrome/browser/extensions/extensions_service.h"
 #include "chrome/browser/profile.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/notification_registrar.h"
 #include "chrome/test/ui_test_utils.h"
 
@@ -103,4 +104,7 @@
 void ExtensionApiTest::SetUpCommandLine(CommandLine* command_line) {
   ExtensionBrowserTest::SetUpCommandLine(command_line);
   test_data_dir_ = test_data_dir_.AppendASCII("api_test");
+
+  // Needed for metrics extension API tests.
+  command_line->AppendSwitch(switches::kEnableMetricsExtensionApi);
 }