Add experiments info to crash dumps.

chrome/browser/metrics/field_trial_synchronizer.cc

 // 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.
 
 #include "chrome/browser/metrics/field_trial_synchronizer.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/threading/thread.h"
+#include "chrome/common/child_process_logging.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/render_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 
 using content::BrowserThread;
 
 FieldTrialSynchronizer::FieldTrialSynchronizer() {
   DCHECK(field_trial_synchronizer_ == NULL);
   field_trial_synchronizer_ = this;
   base::FieldTrialList::AddObserver(this);
 }
 
 FieldTrialSynchronizer::~FieldTrialSynchronizer() {
   base::FieldTrialList::RemoveObserver(this);
   field_trial_synchronizer_ = NULL;
 }
 
+void FieldTrialSynchronizer::Init() {
+  child_process_logging::InitExperimentList();
+}
+
 void FieldTrialSynchronizer::NotifyAllRenderers(
     const std::string& field_trial_name,
     const std::string& group_name) {
   // To iterate over RenderProcessHosts, or to send messages to the hosts, we
   // need to be on the UI thread.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   for (content::RenderProcessHost::iterator it(
           content::RenderProcessHost::AllHostsIterator());
        !it.IsAtEnd(); it.Advance()) {
     it.GetCurrentValue()->Send(
         new ChromeViewMsg_SetFieldTrialGroup(field_trial_name, group_name));
   }
 }
 
 void FieldTrialSynchronizer::OnFieldTrialGroupFinalized(
     const std::string& field_trial_name,
     const std::string& group_name) {
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&FieldTrialSynchronizer::NotifyAllRenderers,
                  this,
                  field_trial_name,
                  group_name));
+  child_process_logging::AddFieldTrialGroup(field_trial_name, group_name);
 }
 
 // static
 FieldTrialSynchronizer*
     FieldTrialSynchronizer::field_trial_synchronizer_ = NULL;