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Side by Side Diff: ios/chrome/browser/metrics/tab_usage_recorder.mm

Issue 2944443003: [ObjC ARC] Converts ios/chrome/browser/ui/stack_view:stack_view to ARC. (Closed)
Patch Set: Created 3 years, 6 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved. 1 // Copyright 2013 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 "ios/chrome/browser/metrics/tab_usage_recorder.h" 5 #include "ios/chrome/browser/metrics/tab_usage_recorder.h"
6 6
7 #include "base/metrics/histogram_macros.h" 7 #include "base/metrics/histogram_macros.h"
8 #include "ios/chrome/browser/chrome_url_constants.h" 8 #include "ios/chrome/browser/chrome_url_constants.h"
9 #import "ios/chrome/browser/metrics/previous_session_info.h" 9 #import "ios/chrome/browser/metrics/previous_session_info.h"
10 #import "ios/chrome/browser/tabs/tab.h" 10 #import "ios/chrome/browser/tabs/tab.h"
11 #import "ios/web/public/navigation_item.h" 11 #import "ios/web/public/navigation_item.h"
12 #import "ios/web/public/navigation_manager.h" 12 #import "ios/web/public/navigation_manager.h"
13 #import "ios/web/public/web_state/web_state.h" 13 #import "ios/web/public/web_state/web_state.h"
14 #import "ios/web/web_state/ui/crw_web_controller.h" 14 #import "ios/web/web_state/ui/crw_web_controller.h"
15 15
16 #if !defined(__has_feature) || !__has_feature(objc_arc)
17 #error "This file requires ARC support."
18 #endif
19
20 const char kTabUsageHistogramPrefix[] = "Tab"; 16 const char kTabUsageHistogramPrefix[] = "Tab";
21 17
22 // The histogram recording the state of the tab the user switches to. 18 // The histogram recording the state of the tab the user switches to.
23 const char kSelectedTabHistogramName[] = 19 const char kSelectedTabHistogramName[] =
24 "Tab.StatusWhenSwitchedBackToForeground"; 20 "Tab.StatusWhenSwitchedBackToForeground";
25 21
26 // The histogram to record the number of page loads before an evicted tab is 22 // The histogram to record the number of page loads before an evicted tab is
27 // selected. 23 // selected.
28 const char kPageLoadsBeforeEvictedTabSelected[] = 24 const char kPageLoadsBeforeEvictedTabSelected[] =
29 "Tab.PageLoadsSinceLastSwitchToEvictedTab"; 25 "Tab.PageLoadsSinceLastSwitchToEvictedTab";
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338 } 334 }
339 335
340 void TabUsageRecorder::ClearDeletedTabs() { 336 void TabUsageRecorder::ClearDeletedTabs() {
341 base::WeakNSObject<Tab> empty_tab(nil); 337 base::WeakNSObject<Tab> empty_tab(nil);
342 auto tab_item = evicted_tabs_.find(empty_tab); 338 auto tab_item = evicted_tabs_.find(empty_tab);
343 while (tab_item != evicted_tabs_.end()) { 339 while (tab_item != evicted_tabs_.end()) {
344 evicted_tabs_.erase(empty_tab); 340 evicted_tabs_.erase(empty_tab);
345 tab_item = evicted_tabs_.find(empty_tab); 341 tab_item = evicted_tabs_.find(empty_tab);
346 } 342 }
347 } 343 }
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