Add UMA stats for predicted process counts with out-of-process iframes.

chrome/browser/memory_details.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEMORY_DETAILS_H_
 #define CHROME_BROWSER_MEMORY_DETAILS_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/process_util.h"
 #include "base/strings/string16.h"
+#include "chrome/browser/site_details.h"
 #include "content/public/common/process_type.h"
 
 // We collect data about each browser process.  A browser may
 // have multiple processes (of course!).  Even IE has multiple
 // processes these days.
 struct ProcessMemoryInformation {
   // 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.
   enum RendererProcessType {
     RENDERER_UNKNOWN = 0,
@@ skipping 46 matching lines @@
 // Browser Process Information.
 struct ProcessData {
   ProcessData();
   ProcessData(const ProcessData& rhs);
   ~ProcessData();
   ProcessData& operator=(const ProcessData& rhs);
 
   string16 name;
   string16 process_name;
   ProcessMemoryInformationList processes;
+
+  // Track site data for predicting process counts with out-of-process iframes.
+  // See site_details.h.
+  BrowserContextSiteDataMap site_data;
 };
 
 #if defined(OS_MACOSX)
 class ProcessInfoSnapshot;
 #endif
 
 // MemoryDetails fetches memory details about current running browsers.
 // Because this data can only be fetched asynchronously, callers use
 // this class via a callback.
 //
@@ skipping 86 matching lines @@
   ProcessData* ChromeBrowser();
 
   std::vector<ProcessData> process_data_;
 
   UserMetricsMode user_metrics_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(MemoryDetails);
 };
 
 #endif  // CHROME_BROWSER_MEMORY_DETAILS_H_