Fix free memory calculation.

chrome/browser/ui/webui/about_ui.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/ui/webui/about_ui.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 12 matching lines @@
 #include "base/macros.h"
 #include "base/memory/singleton.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/process/process_metrics.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/sys_info.h"
 #include "base/task_scheduler/post_task.h"
 #include "base/threading/thread.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/about_flags.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/memory/tab_manager.h"
 #include "chrome/browser/memory/tab_stats.h"
 #include "chrome/browser/net/predictor.h"
@@ skipping 502 matching lines @@
                                    kAboutDiscardsRunCommand));
 
   base::SystemMemoryInfoKB meminfo;
   base::GetSystemMemoryInfo(&meminfo);
   output.append("<h3>System memory information in MB</h3>");
   output.append("<table>");
   // Start with summary statistics.
   output.append(AddStringRow(
       "Total", base::IntToString(meminfo.total / 1024)));
   output.append(AddStringRow(
-      "Free", base::IntToString(meminfo.free / 1024)));
+      "Free",
+      base::IntToString(base::SysInfo::AmountOfAvailablePhysicalMemory() /
+                        1024 / 1024)));
 #if defined(OS_CHROMEOS)
   int mem_allocated_kb = meminfo.active_anon + meminfo.inactive_anon;
 #if defined(ARCH_CPU_ARM_FAMILY)
   // ARM counts allocated graphics memory separately from anonymous.
   if (meminfo.gem_size != -1)
     mem_allocated_kb += meminfo.gem_size / 1024;
 #endif
   output.append(AddStringRow(
       "Allocated", base::IntToString(mem_allocated_kb / 1024)));
   // Add some space, then detailed numbers.
@@ skipping 297 matching lines @@
   Profile* profile = Profile::FromWebUI(web_ui);
 
 #if !defined(OS_ANDROID)
   // Set up the chrome://theme/ source.
   ThemeSource* theme = new ThemeSource(profile);
   content::URLDataSource::Add(profile, theme);
 #endif
 
   content::URLDataSource::Add(profile, new AboutUIHTMLSource(name, profile));
 }