Switch ChildProcess.* enum histograms from COUNTS to ENUMERATION.

content/common/child_process_info.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_COMMON_CHILD_PROCESS_INFO_H_
 #define CONTENT_COMMON_CHILD_PROCESS_INFO_H_
 #pragma once
 
 #include <string>
 
 #include "base/process.h"
 #include "base/string16.h"
 #include "content/common/content_export.h"
 
 // Holds information about a child process.
 class CONTENT_EXPORT ChildProcessInfo {
  public:
   // NOTE: Do not remove or reorder the elements in this enum, and only add new
-  // items at the end. We depend on these specific values in a histogram.
+  // items at the end, right before MAX_PROCESS. We depend on these specific
+  // values in histograms.
   enum ProcessType {
     UNKNOWN_PROCESS = 1,
     BROWSER_PROCESS,
     RENDER_PROCESS,
     PLUGIN_PROCESS,
     WORKER_PROCESS,
     NACL_LOADER_PROCESS,
     UTILITY_PROCESS,
     PROFILE_IMPORT_PROCESS,
     ZYGOTE_PROCESS,
@@ skipping 101 matching lines @@
   RendererProcessType renderer_type_;
   string16 name_;
   string16 version_;
   int id_;
 
   // The handle to the process.
   mutable base::Process process_;
 };
 
 #endif  // CONTENT_COMMON_CHILD_PROCESS_INFO_H_