Fix single-process ui test failures from my previous change. The problem was...

chrome/browser/memory_details.cc

 // Copyright (c) 2006-2008 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 <psapi.h>
 
 #include "base/file_version_info.h"
 #include "base/string_util.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 52 matching lines @@
 
 void MemoryDetails::CollectChildInfoOnIOThread() {
   DCHECK(MessageLoop::current() ==
       ChromeThread::GetMessageLoop(ChromeThread::IO));
 
   std::vector<ProcessMemoryInformation> child_info;
 
   // Collect the list of child processes.
   for (ChildProcessHost::Iterator iter; !iter.Done(); ++iter) {
     ProcessMemoryInformation info;
-    info.pid = iter->pid();
+    info.pid = iter->GetProcessId();
     if (!info.pid)
       continue;
 
     info.type = iter->type();
     info.titles.push_back(iter->name());
     child_info.push_back(info);
   }
 
   // Now go do expensive memory lookups from the file thread.
   ChromeThread::GetMessageLoop(ChromeThread::FILE)->PostTask(FROM_HERE,
@@ skipping 207 matching lines @@
   }
 
   UMA_HISTOGRAM_COUNTS_100("Memory.ProcessCount",
       static_cast<int>(browser.processes.size()));
   UMA_HISTOGRAM_COUNTS_100("Memory.PluginProcessCount", plugin_count);
   UMA_HISTOGRAM_COUNTS_100("Memory.WorkerProcessCount", worker_count);
 
   int total_sample = static_cast<int>(aggregate_memory / 1000);
   UMA_HISTOGRAM_MEMORY_MB("Memory.Total", total_sample);
 }