Swap BrowserList::const_iterator for the multi-desktop aware BrowserIterator in many scenarios.

chrome/browser/ui/uma_browsing_activity_observer.cc

Index: chrome/browser/ui/uma_browsing_activity_observer.cc
diff --git a/chrome/browser/ui/uma_browsing_activity_observer.cc b/chrome/browser/ui/uma_browsing_activity_observer.cc
index a5710e45af57d7642a75733527b3331abd03a1ba..6ae607a537a6ce968ad9ac83b21e94a1b135b415 100644
--- a/chrome/browser/ui/uma_browsing_activity_observer.cc
+++ b/chrome/browser/ui/uma_browsing_activity_observer.cc
@@ -6,6 +6,7 @@
 
 #include "base/metrics/histogram.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_iterator.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
@@ -72,10 +73,9 @@ void UMABrowsingActivityObserver::LogBrowserTabCount() const {
   int panel_window_count = 0;
   int popup_window_count = 0;
   int tabbed_window_count = 0;
-  for (BrowserList::const_iterator browser_iterator = BrowserList::begin();
-       browser_iterator != BrowserList::end(); ++browser_iterator) {
+  for (chrome::BrowserIterator it; !it.done(); it.Next()) {
     // Record how many tabs each window has open.
-    Browser* browser = (*browser_iterator);
+    Browser* browser = *it;
     UMA_HISTOGRAM_CUSTOM_COUNTS("Tabs.TabCountPerWindow",
                                 browser->tab_strip_model()->count(),
                                 1, 200, 50);