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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/prerender/prerender_field_trial.h" | 5 #include "chrome/browser/prerender/prerender_field_trial.h" |
| 6 | 6 |
| 7 #include "base/command_line.h" | 7 #include "base/command_line.h" |
| 8 #include "base/logging.h" | 8 #include "base/logging.h" |
| 9 #include "base/metrics/field_trial.h" | 9 #include "base/metrics/field_trial.h" |
| 10 #include "base/metrics/histogram.h" | 10 #include "base/metrics/histogram.h" |
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| 210 "OmniboxPrerenderHitWeightingTrial", kDivisor, | 210 "OmniboxPrerenderHitWeightingTrial", kDivisor, |
| 211 "OmniboxPrerenderWeight1.0", 2012, 8, 30, NULL)); | 211 "OmniboxPrerenderWeight1.0", 2012, 8, 30, NULL)); |
| 212 const int kOmniboxWeightFourGroup = | 212 const int kOmniboxWeightFourGroup = |
| 213 weighting_trial->AppendGroup("OmniboxPrerenderWeight4.0", | 213 weighting_trial->AppendGroup("OmniboxPrerenderWeight4.0", |
| 214 kFourProbability); | 214 kFourProbability); |
| 215 const int kOmniboxWeightEightGroup = | 215 const int kOmniboxWeightEightGroup = |
| 216 weighting_trial->AppendGroup("OmniboxPrerenderWeight8.0", | 216 weighting_trial->AppendGroup("OmniboxPrerenderWeight8.0", |
| 217 kEightProbability); | 217 kEightProbability); |
| 218 const int group = weighting_trial->group(); | 218 const int group = weighting_trial->group(); |
| 219 if (group == kOmniboxWeightFourGroup) | 219 if (group == kOmniboxWeightFourGroup) |
| 220 AutocompleteActionPredictor::set_hit_weight(4.0); | 220 predictors::AutocompleteActionPredictor::set_hit_weight(4.0); |
| 221 else if (group == kOmniboxWeightEightGroup) | 221 else if (group == kOmniboxWeightEightGroup) |
| 222 AutocompleteActionPredictor::set_hit_weight(8.0); | 222 predictors::AutocompleteActionPredictor::set_hit_weight(8.0); |
| 223 } | 223 } |
| 224 | 224 |
| 225 bool IsOmniboxEnabled(Profile* profile) { | 225 bool IsOmniboxEnabled(Profile* profile) { |
| 226 if (!profile || profile->IsOffTheRecord()) | 226 if (!profile || profile->IsOffTheRecord()) |
| 227 return false; | 227 return false; |
| 228 | 228 |
| 229 if (!PrerenderManager::IsPrerenderingPossible()) | 229 if (!PrerenderManager::IsPrerenderingPossible()) |
| 230 return false; | 230 return false; |
| 231 | 231 |
| 232 // Override any field trial groups if the user has set a command line flag. | 232 // Override any field trial groups if the user has set a command line flag. |
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| 244 | 244 |
| 245 DCHECK(switch_value == switches::kPrerenderFromOmniboxSwitchValueAuto); | 245 DCHECK(switch_value == switches::kPrerenderFromOmniboxSwitchValueAuto); |
| 246 } | 246 } |
| 247 | 247 |
| 248 const int group = base::FieldTrialList::FindValue(kOmniboxTrialName); | 248 const int group = base::FieldTrialList::FindValue(kOmniboxTrialName); |
| 249 return group == base::FieldTrial::kNotFinalized || | 249 return group == base::FieldTrial::kNotFinalized || |
| 250 group == g_omnibox_trial_default_group_number; | 250 group == g_omnibox_trial_default_group_number; |
| 251 } | 251 } |
| 252 | 252 |
| 253 } // namespace prerender | 253 } // namespace prerender |
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