Track when profiles are last used.

chrome/browser/profiles/profile_info_cache_unittest.cc

Index: chrome/browser/profiles/profile_info_cache_unittest.cc
diff --git a/chrome/browser/profiles/profile_info_cache_unittest.cc b/chrome/browser/profiles/profile_info_cache_unittest.cc
index 571411501df6202e6bf58638e5e5fc9f24df01b3..5e110f65983a6ea4079d13ad179e4e5f0bdd9f4b 100644
--- a/chrome/browser/profiles/profile_info_cache_unittest.cc
+++ b/chrome/browser/profiles/profile_info_cache_unittest.cc
@@ -9,6 +9,7 @@
 #include "base/prefs/testing_pref_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/prefs/pref_service_syncable.h"
@@ -307,6 +308,18 @@ TEST_F(ProfileInfoCacheTest, HasMigrated) {
   EXPECT_FALSE(GetCache()->GetHasMigratedToGAIAInfoOfProfileAtIndex(1));
 }
 
+TEST_F(ProfileInfoCacheTest, ProfileActiveTime) {
+  GetCache()->AddProfileToCache(
+      GetProfilePath("path_1"), ASCIIToUTF16("name_1"),
+      base::string16(), 0, std::string());
+  EXPECT_EQ(base::Time(), GetCache()->GetProfileActiveTimeAtIndex(0));
+  base::Time before = base::Time::Now();
+  GetCache()->SetProfileActiveTimeAtIndex(0);
+  base::Time after = base::Time::Now();
+  EXPECT_LE(before, GetCache()->GetProfileActiveTimeAtIndex(0));
+  EXPECT_GE(after, GetCache()->GetProfileActiveTimeAtIndex(0));
+}
+
 TEST_F(ProfileInfoCacheTest, GAIAName) {
   GetCache()->AddProfileToCache(
       GetProfilePath("path_1"), ASCIIToUTF16("name_1"),