Record metrics for slow startups

chrome/browser/bookmarks/bookmark_storage.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/bookmarks/bookmark_storage.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/metrics/histogram.h"
 #include "base/time.h"
 #include "chrome/browser/bookmarks/bookmark_codec.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/common/chrome_constants.h"
+#include "chrome/common/startup_metric_utils.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 
 using base::TimeTicks;
 using content::BrowserThread;
 
 namespace {
 
 // Extension used for backup files (copy of main file created during startup).
 const FilePath::CharType kBackupExtension[] = FILE_PATH_LITERAL("bak");
@@ skipping 14 matching lines @@
       details->index()->Add(node);
   } else {
     for (int i = 0; i < node->child_count(); ++i)
       AddBookmarksToIndex(details, node->GetChild(i));
   }
 }
 
 void LoadCallback(const FilePath& path,
                   BookmarkStorage* storage,
                   BookmarkLoadDetails* details) {
+  startup_metric_utils::ScopedSlowStartupUMA
+      scoped_timer("Startup.SlowStartupBookmarksLoad");
   bool bookmark_file_exists = file_util::PathExists(path);
   if (bookmark_file_exists) {
     JSONFileValueSerializer serializer(path);
     scoped_ptr<Value> root(serializer.Deserialize(NULL, NULL));
 
     if (root.get()) {
       // Building the index can take a while, so we do it on the background
       // thread.
       int64 max_node_id = 0;
       BookmarkCodec codec;
@@ skipping 107 matching lines @@
     NOTREACHED();
     return false;
   }
 
   std::string data;
   if (!SerializeData(&data))
     return false;
   writer_.WriteNow(data);
   return true;
 }