Make SandboxIPCProcess a thread.

chrome/browser/memory_details.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/memory_details.h"
 
 #include "base/bind.h"
 #include "base/file_version_info.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
@@ skipping 186 matching lines @@
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
       base::Bind(&MemoryDetails::CollectProcessData, this, child_info));
 }
 
 void MemoryDetails::CollectChildInfoOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
   const pid_t zygote_pid = content::ZygoteHost::GetInstance()->GetPid();
-  const pid_t sandbox_helper_pid =
-      content::ZygoteHost::GetInstance()->GetSandboxHelperPid();
 #endif
 
   ProcessData* const chrome_browser = ChromeBrowser();
   // Get more information about the process.
   for (size_t index = 0; index < chrome_browser->processes.size();
       index++) {
     // Check if it's a renderer, if so get the list of page titles in it and
     // check if it's a diagnostics-related process.  We skip about:memory pages.
     // Iterate the RenderProcessHosts to find the tab contents.
     ProcessMemoryInformation& process =
@@ skipping 113 matching lines @@
           (pending_entry &&
            LowerCaseEqualsASCII(pending_entry->GetVirtualURL().spec(),
                                 chrome::kChromeUIMemoryURL))) {
         process.is_diagnostics = true;
       }
     }
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
     if (process.pid == zygote_pid) {
       process.process_type = content::PROCESS_TYPE_ZYGOTE;
-    } else if (process.pid == sandbox_helper_pid) {
-      process.process_type = content::PROCESS_TYPE_SANDBOX_HELPER;
     }
 #endif
   }
 
   // Get rid of other Chrome processes that are from a different profile.
   for (size_t index = 0; index < chrome_browser->processes.size();
       index++) {
     if (chrome_browser->processes[index].process_type ==
         content::PROCESS_TYPE_UNKNOWN) {
       chrome_browser->processes.erase(
@@ skipping 224 matching lines @@
 
   if (swap_info_.orig_data_size > 0 && swap_info_.compr_data_size > 0) {
     UMA_HISTOGRAM_CUSTOM_COUNTS(
         "Memory.Swap.CompressionRatio",
         swap_info_.orig_data_size / swap_info_.compr_data_size,
         1, 20, 20);
   }
 }
 
 #endif