Implements the storage free space watching functionality into storage info provider

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 3231c3d1e7fbd1fa11723d2133cca69fa6c6af4f..a03b8e9686432f72c0193b88d2071802aa7195ba 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
@@ -24,7 +24,7 @@ class MockStorageInfoProvider : public StorageInfoProvider {
   MockStorageInfoProvider() : is_watching_(false) {
   }
   virtual ~MockStorageInfoProvider() {
-    StopWatching();
+    Stop();
   }
 
   virtual bool QueryInfo(StorageInfo* info) OVERRIDE {
@@ -46,7 +46,7 @@ class MockStorageInfoProvider : public StorageInfoProvider {
     return false;
   }
 
-  bool StartWatching() {
+  bool Start() {
     if (is_watching_) return false;
 
     // Start the timer to emulate storage.onChanged event.
@@ -58,7 +58,7 @@ class MockStorageInfoProvider : public StorageInfoProvider {
     return true;
   }
 
-  bool StopWatching() {
+  bool Stop() {
     if (!is_watching_) return false;
     is_watching_ = false;
     timer_.Stop();
@@ -110,7 +110,7 @@ IN_PROC_BROWSER_TEST_F(SystemInfoStorageApiTest, Storage) {
   ui_test_utils::NavigateToURL(browser(), page_url);
   EXPECT_TRUE(listener.WaitUntilSatisfied());
 
-  provider->StartWatching();
+  provider->Start();
   listener.Reply("go");
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
 }