Add the basic code skeleton for system info event router

chrome/browser/extensions/api/system_info_storage/system_info_storage_apitest.cc

Index: chrome/browser/extensions/api/system_info_storage/system_info_storage_apitest.cc
diff --git a/chrome/browser/extensions/api/system_info_storage/system_info_storage_apitest.cc b/chrome/browser/extensions/api/system_info_storage/system_info_storage_apitest.cc
index c55d0ae3edb2866c75d556dcfc059c1ec7a4a828..a5b369731aee2ef4d7090a950478391493fa15f1 100644
--- a/chrome/browser/extensions/api/system_info_storage/system_info_storage_apitest.cc
+++ b/chrome/browser/extensions/api/system_info_storage/system_info_storage_apitest.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 #include "base/command_line.h"
 #include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/browser/extensions/mock_system_info_watcher.h"
 #include "chrome/common/chrome_switches.h"
 
 namespace extensions {
@@ -15,6 +16,13 @@ class SystemInfoStorageApiTest: public ExtensionApiTest {
     ExtensionApiTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kEnableExperimentalExtensionApis);
   }
+  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
+    ExtensionApiTest::SetUpInProcessBrowserTestFixture();
+
+    SystemInfoWatcher* watcher = new MockSystemInfoWatcher();
+    // The watcher is owned by SystemInfoWatcher instance.
+    SystemInfoWatcher::InitializeForTesting(watcher);
+  }
 };
 
 IN_PROC_BROWSER_TEST_F(SystemInfoStorageApiTest, Storage) {