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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "chrome/browser/metrics/field_trial_synchronizer.h" | 5 #include "chrome/browser/metrics/field_trial_synchronizer.h" |
| 6 | 6 |
| 7 #include "base/logging.h" | 7 #include "base/logging.h" |
| 8 #include "base/threading/thread.h" | 8 #include "base/threading/thread.h" |
| 9 #include "chrome/common/chrome_constants.h" | 9 #include "chrome/common/chrome_constants.h" |
| 10 #include "chrome/common/render_messages.h" | 10 #include "chrome/common/render_messages.h" |
| 11 #include "content/browser/renderer_host/render_process_host.h" | |
| 12 #include "content/public/browser/browser_thread.h" | 11 #include "content/public/browser/browser_thread.h" |
| 12 #include "content/public/browser/render_process_host.h" |
| 13 | 13 |
| 14 using content::BrowserThread; | 14 using content::BrowserThread; |
| 15 | 15 |
| 16 FieldTrialSynchronizer::FieldTrialSynchronizer() { | 16 FieldTrialSynchronizer::FieldTrialSynchronizer() { |
| 17 DCHECK(field_trial_synchronizer_ == NULL); | 17 DCHECK(field_trial_synchronizer_ == NULL); |
| 18 field_trial_synchronizer_ = this; | 18 field_trial_synchronizer_ = this; |
| 19 base::FieldTrialList::AddObserver(this); | 19 base::FieldTrialList::AddObserver(this); |
| 20 } | 20 } |
| 21 | 21 |
| 22 FieldTrialSynchronizer::~FieldTrialSynchronizer() { | 22 FieldTrialSynchronizer::~FieldTrialSynchronizer() { |
| 23 base::FieldTrialList::RemoveObserver(this); | 23 base::FieldTrialList::RemoveObserver(this); |
| 24 field_trial_synchronizer_ = NULL; | 24 field_trial_synchronizer_ = NULL; |
| 25 } | 25 } |
| 26 | 26 |
| 27 void FieldTrialSynchronizer::NotifyAllRenderers( | 27 void FieldTrialSynchronizer::NotifyAllRenderers( |
| 28 const std::string& field_trial_name, | 28 const std::string& field_trial_name, |
| 29 const std::string& group_name) { | 29 const std::string& group_name) { |
| 30 // To iterate over RenderProcessHosts, or to send messages to the hosts, we | 30 // To iterate over RenderProcessHosts, or to send messages to the hosts, we |
| 31 // need to be on the UI thread. | 31 // need to be on the UI thread. |
| 32 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | 32 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| 33 | 33 |
| 34 for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator()); | 34 for (content::RenderProcessHost::iterator it( |
| 35 content::RenderProcessHost::AllHostsIterator()); |
| 35 !it.IsAtEnd(); it.Advance()) { | 36 !it.IsAtEnd(); it.Advance()) { |
| 36 it.GetCurrentValue()->Send( | 37 it.GetCurrentValue()->Send( |
| 37 new ChromeViewMsg_SetFieldTrialGroup(field_trial_name, group_name)); | 38 new ChromeViewMsg_SetFieldTrialGroup(field_trial_name, group_name)); |
| 38 } | 39 } |
| 39 } | 40 } |
| 40 | 41 |
| 41 void FieldTrialSynchronizer::OnFieldTrialGroupFinalized( | 42 void FieldTrialSynchronizer::OnFieldTrialGroupFinalized( |
| 42 const std::string& field_trial_name, | 43 const std::string& field_trial_name, |
| 43 const std::string& group_name) { | 44 const std::string& group_name) { |
| 44 BrowserThread::PostTask( | 45 BrowserThread::PostTask( |
| 45 BrowserThread::UI, FROM_HERE, | 46 BrowserThread::UI, FROM_HERE, |
| 46 NewRunnableMethod(this, | 47 NewRunnableMethod(this, |
| 47 &FieldTrialSynchronizer::NotifyAllRenderers, | 48 &FieldTrialSynchronizer::NotifyAllRenderers, |
| 48 field_trial_name, | 49 field_trial_name, |
| 49 group_name)); | 50 group_name)); |
| 50 } | 51 } |
| 51 | 52 |
| 52 // static | 53 // static |
| 53 FieldTrialSynchronizer* | 54 FieldTrialSynchronizer* |
| 54 FieldTrialSynchronizer::field_trial_synchronizer_ = NULL; | 55 FieldTrialSynchronizer::field_trial_synchronizer_ = NULL; |
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