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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/bind.h" | 7 #include "base/bind.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "base/threading/thread.h" | 9 #include "base/threading/thread.h" |
10 #include "chrome/common/chrome_constants.h" | |
11 #include "chrome/common/render_messages.h" | 10 #include "chrome/common/render_messages.h" |
12 #include "components/variations/variations_util.h" | 11 #include "components/variations/variations_util.h" |
13 #include "content/public/browser/browser_thread.h" | 12 #include "content/public/browser/browser_thread.h" |
14 #include "content/public/browser/render_process_host.h" | 13 #include "content/public/browser/render_process_host.h" |
15 | 14 |
16 using content::BrowserThread; | 15 using content::BrowserThread; |
17 | 16 |
18 namespace { | 17 namespace { |
19 | 18 |
20 // This singleton instance should be constructed during the single threaded | 19 // This singleton instance should be constructed during the single threaded |
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33 variations::SetVariationListCrashKeys(); | 32 variations::SetVariationListCrashKeys(); |
34 } | 33 } |
35 | 34 |
36 void FieldTrialSynchronizer::NotifyAllRenderers( | 35 void FieldTrialSynchronizer::NotifyAllRenderers( |
37 const std::string& field_trial_name, | 36 const std::string& field_trial_name, |
38 const std::string& group_name) { | 37 const std::string& group_name) { |
39 // To iterate over RenderProcessHosts, or to send messages to the hosts, we | 38 // To iterate over RenderProcessHosts, or to send messages to the hosts, we |
40 // need to be on the UI thread. | 39 // need to be on the UI thread. |
41 DCHECK_CURRENTLY_ON(BrowserThread::UI); | 40 DCHECK_CURRENTLY_ON(BrowserThread::UI); |
42 | 41 |
43 // Check that the sender's PID doesn't change between messages. We expect | |
44 // these IPCs to always be delivered from the same browser process, whose pid | |
45 // should not change. | |
46 // TODO(asvitkine): Remove this after http://crbug.com/359406 is fixed. | |
47 static base::ProcessId sender_pid = base::Process::Current().Pid(); | |
48 for (content::RenderProcessHost::iterator it( | 42 for (content::RenderProcessHost::iterator it( |
49 content::RenderProcessHost::AllHostsIterator()); | 43 content::RenderProcessHost::AllHostsIterator()); |
50 !it.IsAtEnd(); it.Advance()) { | 44 !it.IsAtEnd(); it.Advance()) { |
51 it.GetCurrentValue()->Send(new ChromeViewMsg_SetFieldTrialGroup( | 45 it.GetCurrentValue()->Send(new ChromeViewMsg_SetFieldTrialGroup( |
52 field_trial_name, group_name, sender_pid, | 46 field_trial_name, group_name)); |
53 base::FieldTrialList::GetDebugToken())); | |
54 } | 47 } |
55 } | 48 } |
56 | 49 |
57 void FieldTrialSynchronizer::OnFieldTrialGroupFinalized( | 50 void FieldTrialSynchronizer::OnFieldTrialGroupFinalized( |
58 const std::string& field_trial_name, | 51 const std::string& field_trial_name, |
59 const std::string& group_name) { | 52 const std::string& group_name) { |
60 // TODO(asvitkine): Remove these CHECKs once http://crbug.com/359406 is fixed. | |
61 CHECK(!field_trial_name.empty() && !group_name.empty()); | |
62 CHECK_EQ(group_name, base::FieldTrialList::FindFullName(field_trial_name)) | |
63 << field_trial_name << ":" << group_name << "=>" | |
64 << base::FieldTrialList::FindFullName(field_trial_name); | |
65 BrowserThread::PostTask( | 53 BrowserThread::PostTask( |
66 BrowserThread::UI, FROM_HERE, | 54 BrowserThread::UI, FROM_HERE, |
67 base::Bind(&FieldTrialSynchronizer::NotifyAllRenderers, | 55 base::Bind(&FieldTrialSynchronizer::NotifyAllRenderers, |
68 this, | 56 this, |
69 field_trial_name, | 57 field_trial_name, |
70 group_name)); | 58 group_name)); |
71 variations::SetVariationListCrashKeys(); | 59 variations::SetVariationListCrashKeys(); |
72 } | 60 } |
73 | 61 |
74 FieldTrialSynchronizer::~FieldTrialSynchronizer() { | 62 FieldTrialSynchronizer::~FieldTrialSynchronizer() { |
75 base::FieldTrialList::RemoveObserver(this); | 63 base::FieldTrialList::RemoveObserver(this); |
76 g_field_trial_synchronizer = NULL; | 64 g_field_trial_synchronizer = NULL; |
77 } | 65 } |
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