1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
|
// Copyright 2014 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/extensions/extension_storage_monitor.h"
#include <map>
#include <utility>
#include "base/metrics/histogram.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_storage_monitor_factory.h"
#include "chrome/browser/extensions/extension_util.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
#include "chrome/grit/generated_resources.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/storage_partition.h"
#include "extensions/browser/extension_prefs.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_system.h"
#include "extensions/browser/image_loader.h"
#include "extensions/browser/uninstall_reason.h"
#include "extensions/common/extension.h"
#include "extensions/common/manifest_handlers/icons_handler.h"
#include "extensions/common/permissions/permissions_data.h"
#include "storage/browser/quota/quota_manager.h"
#include "storage/browser/quota/storage_observer.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/message_center/message_center.h"
#include "ui/message_center/notifier_settings.h"
#include "ui/message_center/views/constants.h"
using content::BrowserThread;
namespace extensions {
namespace {
// The rate at which we would like to observe storage events.
const int kStorageEventRateSec = 30;
// Set the thresholds for the first notification. Once a threshold is exceeded,
// it will be doubled to throttle notifications.
const int64_t kMBytes = 1024 * 1024;
const int64_t kExtensionInitialThreshold = 1000 * kMBytes;
// Notifications have an ID so that we can update them.
const char kNotificationIdFormat[] = "ExtensionStorageMonitor-$1-$2";
const char kSystemNotifierId[] = "ExtensionStorageMonitor";
// A preference that stores the next threshold for displaying a notification
// when an extension or app consumes excessive disk space. This will not be
// set until the extension/app reaches the initial threshold.
const char kPrefNextStorageThreshold[] = "next_storage_threshold";
// If this preference is set to true, notifications will be suppressed when an
// extension or app consumes excessive disk space.
const char kPrefDisableStorageNotifications[] = "disable_storage_notifications";
bool ShouldMonitorStorageFor(const Extension* extension) {
// Only monitor storage for extensions that are granted unlimited storage.
// Do not monitor storage for component extensions.
return extension->permissions_data()->HasAPIPermission(
APIPermission::kUnlimitedStorage) &&
extension->location() != Manifest::COMPONENT;
}
bool ShouldGatherMetricsFor(const Extension* extension) {
// We want to know the usage of hosted apps' storage.
return ShouldMonitorStorageFor(extension) && extension->is_hosted_app();
}
const Extension* GetExtensionById(content::BrowserContext* context,
const std::string& extension_id) {
return ExtensionRegistry::Get(context)->GetExtensionById(
extension_id, ExtensionRegistry::EVERYTHING);
}
void LogTemporaryStorageUsage(int64_t usage,
storage::QuotaStatusCode status,
int64_t global_quota) {
if (status == storage::kQuotaStatusOk) {
int64_t per_app_quota =
global_quota / storage::QuotaManager::kPerHostTemporaryPortion;
// Note we use COUNTS_100 (instead of PERCENT) because this can potentially
// exceed 100%.
UMA_HISTOGRAM_COUNTS_100(
"Extensions.HostedAppUnlimitedStorageTemporaryStorageUsage",
100.0 * usage / per_app_quota);
}
}
} // namespace
// StorageEventObserver monitors the storage usage of extensions and lives on
// the IO thread. When a threshold is exceeded, a message will be posted to the
// UI thread, which displays the notification.
class StorageEventObserver
: public base::RefCountedThreadSafe<StorageEventObserver,
BrowserThread::DeleteOnIOThread>,
public storage::StorageObserver {
public:
explicit StorageEventObserver(
base::WeakPtr<ExtensionStorageMonitor> storage_monitor)
: storage_monitor_(storage_monitor) {
}
// Register as an observer for the extension's storage events.
void StartObservingForExtension(
scoped_refptr<storage::QuotaManager> quota_manager,
const std::string& extension_id,
const GURL& site_url,
int64_t next_threshold,
const base::TimeDelta& rate,
bool should_uma) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK(quota_manager.get());
GURL origin = site_url.GetOrigin();
StorageState& state = origin_state_map_[origin];
state.quota_manager = quota_manager;
state.extension_id = extension_id;
state.next_threshold = next_threshold;
state.should_uma = should_uma;
// We always observe persistent storage usage.
storage::StorageObserver::MonitorParams params(
storage::kStorageTypePersistent, origin, rate, false);
quota_manager->AddStorageObserver(this, params);
if (should_uma) {
// And if this is for uma, we also observe temporary storage usage.
MonitorParams temporary_params(
storage::kStorageTypeTemporary, origin, rate, false);
quota_manager->AddStorageObserver(this, temporary_params);
}
}
// Updates the threshold for an extension already being monitored.
void UpdateThresholdForExtension(const std::string& extension_id,
int64_t next_threshold) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
for (OriginStorageStateMap::iterator it = origin_state_map_.begin();
it != origin_state_map_.end();
++it) {
if (it->second.extension_id == extension_id) {
it->second.next_threshold = next_threshold;
break;
}
}
}
// Deregister as an observer for the extension's storage events.
void StopObservingForExtension(const std::string& extension_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
for (OriginStorageStateMap::iterator it = origin_state_map_.begin();
it != origin_state_map_.end(); ) {
if (it->second.extension_id == extension_id) {
storage::StorageObserver::Filter filter(
storage::kStorageTypePersistent, it->first);
it->second.quota_manager->RemoveStorageObserverForFilter(this, filter);
// We also need to unregister temporary storage observation, if this was
// being tracked for uma.
if (it->second.should_uma) {
storage::StorageObserver::Filter temporary_filter(
storage::kStorageTypeTemporary, it->first);
it->second.quota_manager->RemoveStorageObserverForFilter(this,
filter);
}
origin_state_map_.erase(it++);
} else {
++it;
}
}
}
// Stop observing all storage events. Called during shutdown.
void StopObserving() {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
for (OriginStorageStateMap::iterator it = origin_state_map_.begin();
it != origin_state_map_.end(); ++it) {
it->second.quota_manager->RemoveStorageObserver(this);
}
origin_state_map_.clear();
}
private:
friend class base::DeleteHelper<StorageEventObserver>;
friend struct content::BrowserThread::DeleteOnThread<
content::BrowserThread::IO>;
struct StorageState {
scoped_refptr<storage::QuotaManager> quota_manager;
std::string extension_id;
// If |next_threshold| is -1, it signifies that we should not enforce (and
// only track) storage for this extension.
int64_t next_threshold;
bool should_uma;
StorageState() : next_threshold(-1), should_uma(false) {}
};
typedef std::map<GURL, StorageState> OriginStorageStateMap;
~StorageEventObserver() override {
DCHECK(origin_state_map_.empty());
StopObserving();
}
// storage::StorageObserver implementation.
void OnStorageEvent(const Event& event) override {
OriginStorageStateMap::iterator iter =
origin_state_map_.find(event.filter.origin);
if (iter == origin_state_map_.end())
return;
StorageState& state = iter->second;
if (state.should_uma) {
if (event.filter.storage_type == storage::kStorageTypePersistent) {
UMA_HISTOGRAM_MEMORY_KB(
"Extensions.HostedAppUnlimitedStoragePersistentStorageUsage",
event.usage);
} else {
// We can't use the quota in the event because it assumes unlimited
// storage.
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&storage::QuotaManager::GetTemporaryGlobalQuota,
state.quota_manager,
base::Bind(&LogTemporaryStorageUsage, event.usage)));
}
}
if (state.next_threshold != -1 &&
event.usage >= state.next_threshold) {
while (event.usage >= state.next_threshold)
state.next_threshold *= 2;
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&ExtensionStorageMonitor::OnStorageThresholdExceeded,
storage_monitor_,
state.extension_id,
state.next_threshold,
event.usage));
}
}
OriginStorageStateMap origin_state_map_;
base::WeakPtr<ExtensionStorageMonitor> storage_monitor_;
};
// ExtensionStorageMonitor
// static
ExtensionStorageMonitor* ExtensionStorageMonitor::Get(
content::BrowserContext* context) {
return ExtensionStorageMonitorFactory::GetForBrowserContext(context);
}
ExtensionStorageMonitor::ExtensionStorageMonitor(
content::BrowserContext* context)
: enable_for_all_extensions_(false),
initial_extension_threshold_(kExtensionInitialThreshold),
observer_rate_(base::TimeDelta::FromSeconds(kStorageEventRateSec)),
context_(context),
extension_prefs_(ExtensionPrefs::Get(context)),
extension_registry_observer_(this),
weak_ptr_factory_(this) {
DCHECK(extension_prefs_);
registrar_.Add(this, chrome::NOTIFICATION_PROFILE_DESTROYED,
content::Source<content::BrowserContext>(context_));
extension_registry_observer_.Add(ExtensionRegistry::Get(context_));
}
ExtensionStorageMonitor::~ExtensionStorageMonitor() {}
void ExtensionStorageMonitor::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case chrome::NOTIFICATION_PROFILE_DESTROYED: {
StopMonitoringAll();
break;
}
default:
NOTREACHED();
}
}
void ExtensionStorageMonitor::OnExtensionLoaded(
content::BrowserContext* browser_context,
const Extension* extension) {
StartMonitoringStorage(extension);
}
void ExtensionStorageMonitor::OnExtensionUnloaded(
content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason) {
StopMonitoringStorage(extension->id());
}
void ExtensionStorageMonitor::OnExtensionWillBeInstalled(
content::BrowserContext* browser_context,
const Extension* extension,
bool is_update,
const std::string& old_name) {
if (!ShouldMonitorStorageFor(extension))
return;
if (!enable_for_all_extensions_) {
// If monitoring is not enabled for installed extensions, just stop
// monitoring.
SetNextStorageThreshold(extension->id(), 0);
StopMonitoringStorage(extension->id());
return;
}
int64_t next_threshold = GetNextStorageThresholdFromPrefs(extension->id());
if (next_threshold <= initial_extension_threshold_) {
// Clear the next threshold in the prefs. This effectively raises it to
// |initial_extension_threshold_|. If the current threshold is already
// higher than this, leave it as is.
SetNextStorageThreshold(extension->id(), 0);
if (storage_observer_.get()) {
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&StorageEventObserver::UpdateThresholdForExtension,
storage_observer_,
extension->id(),
initial_extension_threshold_));
}
}
}
void ExtensionStorageMonitor::OnExtensionUninstalled(
content::BrowserContext* browser_context,
const Extension* extension,
extensions::UninstallReason reason) {
RemoveNotificationForExtension(extension->id());
}
void ExtensionStorageMonitor::OnExtensionUninstallDialogClosed(
bool did_start_uninstall,
const base::string16& error) {
// We may get a lagging OnExtensionUninstalledDialogClosed() call during
// testing, but did_start_uninstall should be false in this case.
DCHECK(!uninstall_extension_id_.empty() || !did_start_uninstall);
uninstall_extension_id_.clear();
}
std::string ExtensionStorageMonitor::GetNotificationId(
const std::string& extension_id) {
std::vector<std::string> placeholders;
placeholders.push_back(context_->GetPath().BaseName().MaybeAsASCII());
placeholders.push_back(extension_id);
return base::ReplaceStringPlaceholders(
kNotificationIdFormat, placeholders, NULL);
}
void ExtensionStorageMonitor::OnStorageThresholdExceeded(
const std::string& extension_id,
int64_t next_threshold,
int64_t current_usage) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
const Extension* extension = GetExtensionById(context_, extension_id);
if (!extension)
return;
if (GetNextStorageThreshold(extension->id()) < next_threshold)
SetNextStorageThreshold(extension->id(), next_threshold);
const int kIconSize = message_center::kNotificationIconSize;
ExtensionResource resource = IconsInfo::GetIconResource(
extension, kIconSize, ExtensionIconSet::MATCH_BIGGER);
ImageLoader::Get(context_)->LoadImageAsync(
extension, resource, gfx::Size(kIconSize, kIconSize),
base::Bind(&ExtensionStorageMonitor::OnImageLoaded,
weak_ptr_factory_.GetWeakPtr(),
extension_id,
current_usage));
}
void ExtensionStorageMonitor::OnImageLoaded(const std::string& extension_id,
int64_t current_usage,
const gfx::Image& image) {
const Extension* extension = GetExtensionById(context_, extension_id);
if (!extension)
return;
// Remove any existing notifications to force a new notification to pop up.
std::string notification_id(GetNotificationId(extension_id));
message_center::MessageCenter::Get()->RemoveNotification(
notification_id, false);
message_center::RichNotificationData notification_data;
notification_data.buttons.push_back(message_center::ButtonInfo(
l10n_util::GetStringUTF16(extension->is_app() ?
IDS_EXTENSION_STORAGE_MONITOR_BUTTON_DISMISS_APP :
IDS_EXTENSION_STORAGE_MONITOR_BUTTON_DISMISS_EXTENSION)));
notification_data.buttons.push_back(message_center::ButtonInfo(
l10n_util::GetStringUTF16(extension->is_app() ?
IDS_EXTENSION_STORAGE_MONITOR_BUTTON_UNINSTALL_APP :
IDS_EXTENSION_STORAGE_MONITOR_BUTTON_UNINSTALL_EXTENSION)));
gfx::Image notification_image(image);
if (notification_image.IsEmpty()) {
notification_image =
extension->is_app() ? gfx::Image(util::GetDefaultAppIcon())
: gfx::Image(util::GetDefaultExtensionIcon());
}
scoped_ptr<message_center::Notification> notification;
notification.reset(new message_center::Notification(
message_center::NOTIFICATION_TYPE_SIMPLE, notification_id,
l10n_util::GetStringUTF16(IDS_EXTENSION_STORAGE_MONITOR_TITLE),
l10n_util::GetStringFUTF16(
IDS_EXTENSION_STORAGE_MONITOR_TEXT,
base::UTF8ToUTF16(extension->name()),
base::Int64ToString16(current_usage / kMBytes)),
notification_image, base::string16() /* display source */, GURL(),
message_center::NotifierId(message_center::NotifierId::SYSTEM_COMPONENT,
kSystemNotifierId),
notification_data,
new message_center::HandleNotificationButtonClickDelegate(
base::Bind(&ExtensionStorageMonitor::OnNotificationButtonClick,
weak_ptr_factory_.GetWeakPtr(), extension_id))));
notification->SetSystemPriority();
message_center::MessageCenter::Get()->AddNotification(
std::move(notification));
notified_extension_ids_.insert(extension_id);
}
void ExtensionStorageMonitor::OnNotificationButtonClick(
const std::string& extension_id, int button_index) {
switch (button_index) {
case BUTTON_DISABLE_NOTIFICATION: {
DisableStorageMonitoring(extension_id);
break;
}
case BUTTON_UNINSTALL: {
ShowUninstallPrompt(extension_id);
break;
}
default:
NOTREACHED();
}
}
void ExtensionStorageMonitor::DisableStorageMonitoring(
const std::string& extension_id) {
scoped_refptr<const Extension> extension =
ExtensionRegistry::Get(context_)->enabled_extensions().GetByID(
extension_id);
if (!extension.get() || !ShouldGatherMetricsFor(extension.get()))
StopMonitoringStorage(extension_id);
SetStorageNotificationEnabled(extension_id, false);
message_center::MessageCenter::Get()->RemoveNotification(
GetNotificationId(extension_id), false);
}
void ExtensionStorageMonitor::StartMonitoringStorage(
const Extension* extension) {
if (!ShouldMonitorStorageFor(extension))
return;
bool should_enforce = (enable_for_all_extensions_) &&
IsStorageNotificationEnabled(extension->id());
bool for_metrics = ShouldGatherMetricsFor(extension);
if (!should_enforce && !for_metrics)
return; // Don't track this extension.
// Lazily create the storage monitor proxy on the IO thread.
if (!storage_observer_.get()) {
storage_observer_ =
new StorageEventObserver(weak_ptr_factory_.GetWeakPtr());
}
GURL site_url = util::GetSiteForExtensionId(extension->id(), context_);
content::StoragePartition* storage_partition =
content::BrowserContext::GetStoragePartitionForSite(context_, site_url);
DCHECK(storage_partition);
scoped_refptr<storage::QuotaManager> quota_manager(
storage_partition->GetQuotaManager());
GURL storage_origin(site_url.GetOrigin());
if (extension->is_hosted_app())
storage_origin = AppLaunchInfo::GetLaunchWebURL(extension).GetOrigin();
// Don't give a threshold if we're not enforcing.
int next_threshold =
should_enforce ? GetNextStorageThreshold(extension->id()) : -1;
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&StorageEventObserver::StartObservingForExtension,
storage_observer_,
quota_manager,
extension->id(),
storage_origin,
next_threshold,
observer_rate_,
for_metrics));
}
void ExtensionStorageMonitor::StopMonitoringStorage(
const std::string& extension_id) {
if (!storage_observer_.get())
return;
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&StorageEventObserver::StopObservingForExtension,
storage_observer_,
extension_id));
}
void ExtensionStorageMonitor::StopMonitoringAll() {
extension_registry_observer_.RemoveAll();
RemoveAllNotifications();
if (!storage_observer_.get())
return;
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&StorageEventObserver::StopObserving, storage_observer_));
storage_observer_ = NULL;
}
void ExtensionStorageMonitor::RemoveNotificationForExtension(
const std::string& extension_id) {
std::set<std::string>::iterator ext_id =
notified_extension_ids_.find(extension_id);
if (ext_id == notified_extension_ids_.end())
return;
notified_extension_ids_.erase(ext_id);
message_center::MessageCenter::Get()->RemoveNotification(
GetNotificationId(extension_id), false);
}
void ExtensionStorageMonitor::RemoveAllNotifications() {
if (notified_extension_ids_.empty())
return;
message_center::MessageCenter* center = message_center::MessageCenter::Get();
DCHECK(center);
for (std::set<std::string>::iterator it = notified_extension_ids_.begin();
it != notified_extension_ids_.end(); ++it) {
center->RemoveNotification(GetNotificationId(*it), false);
}
notified_extension_ids_.clear();
}
void ExtensionStorageMonitor::ShowUninstallPrompt(
const std::string& extension_id) {
const Extension* extension = GetExtensionById(context_, extension_id);
if (!extension)
return;
if (!uninstall_dialog_.get()) {
uninstall_dialog_.reset(ExtensionUninstallDialog::Create(
Profile::FromBrowserContext(context_), NULL, this));
}
uninstall_extension_id_ = extension->id();
uninstall_dialog_->ConfirmUninstall(
extension, extensions::UNINSTALL_REASON_STORAGE_THRESHOLD_EXCEEDED,
UNINSTALL_SOURCE_STORAGE_THRESHOLD_EXCEEDED);
}
int64_t ExtensionStorageMonitor::GetNextStorageThreshold(
const std::string& extension_id) const {
int next_threshold = GetNextStorageThresholdFromPrefs(extension_id);
if (next_threshold == 0) {
// The next threshold is written to the prefs after the initial threshold is
// exceeded.
next_threshold = initial_extension_threshold_;
}
return next_threshold;
}
void ExtensionStorageMonitor::SetNextStorageThreshold(
const std::string& extension_id,
int64_t next_threshold) {
extension_prefs_->UpdateExtensionPref(
extension_id,
kPrefNextStorageThreshold,
next_threshold > 0
? new base::StringValue(base::Int64ToString(next_threshold))
: NULL);
}
int64_t ExtensionStorageMonitor::GetNextStorageThresholdFromPrefs(
const std::string& extension_id) const {
std::string next_threshold_str;
if (extension_prefs_->ReadPrefAsString(
extension_id, kPrefNextStorageThreshold, &next_threshold_str)) {
int64_t next_threshold;
if (base::StringToInt64(next_threshold_str, &next_threshold))
return next_threshold;
}
// A return value of zero indicates that the initial threshold has not yet
// been reached.
return 0;
}
bool ExtensionStorageMonitor::IsStorageNotificationEnabled(
const std::string& extension_id) const {
bool disable_notifications;
if (extension_prefs_->ReadPrefAsBoolean(extension_id,
kPrefDisableStorageNotifications,
&disable_notifications)) {
return !disable_notifications;
}
return true;
}
void ExtensionStorageMonitor::SetStorageNotificationEnabled(
const std::string& extension_id,
bool enable_notifications) {
extension_prefs_->UpdateExtensionPref(
extension_id,
kPrefDisableStorageNotifications,
enable_notifications ? NULL : new base::FundamentalValue(true));
}
} // namespace extensions
|