Added units to the --performance-monitor-gathering flag description

chrome/common/chrome_switches.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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 978 matching lines @@
 const char kPackExtensionKey[]              = "pack-extension-key";
 
 // Specifies the path to the user data folder for the parent profile.
 const char kParentProfile[]                 = "parent-profile";
 
 // Launches PerformanceMonitor at startup, which will gather statistics about
 // Chrome's CPU and memory usage, page load times, startup times, and network
 // usage, and will also store information about events which may be of interest,
 // such as extension-related occurrences and crashes. Optionally, this may be
 // run with an integer value representing the interval between the timed
-// metric gatherings (if invalid or not provided, the default interval is used).
+// metric gatherings, measured in seconds (if invalid or not provided, the
+// default interval is used).
 const char kPerformanceMonitorGathering[]  = "performance-monitor-gathering";
 
 // Read previously recorded data from the cache. Only cached data is read.
 // See kRecordMode.
 const char kPlaybackMode[]                  = "playback-mode";
 
 // Overrides the path to the location that PNaCl is installed.
 const char kPnaclDir[]                      = "pnacl-dir";
 
 // Controls the PPAPI Flash field trial. Valid values are defined below. If an
@@ skipping 570 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches