Audit the last usage of Geolocation and Notification permissions.

chrome/browser/content_settings/host_content_settings_map.cc

Index: chrome/browser/content_settings/host_content_settings_map.cc
diff --git a/chrome/browser/content_settings/host_content_settings_map.cc b/chrome/browser/content_settings/host_content_settings_map.cc
index a1ff14c776a34c7e224d358a578ad0037efcfcf0..14550014a217c2505067f6c5a52de40d439d3f17 100644
--- a/chrome/browser/content_settings/host_content_settings_map.cc
+++ b/chrome/browser/content_settings/host_content_settings_map.cc
@@ -12,6 +12,7 @@
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/time/clock.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/content_settings_custom_extension_provider.h"
 #include "chrome/browser/content_settings/content_settings_default_provider.h"
@@ -298,6 +299,13 @@ void HostContentSettingsMap::SetContentSetting(
     const std::string& resource_identifier,
     ContentSetting setting) {
   DCHECK(!ContentTypeHasCompoundValue(content_type));
+
+  if (setting == CONTENT_SETTING_ALLOW &&
+      (content_type == CONTENT_SETTINGS_TYPE_GEOLOCATION ||
+       content_type == CONTENT_SETTINGS_TYPE_NOTIFICATIONS)) {
+    UpdateLastUsageByPattern(primary_pattern, secondary_pattern, content_type);
+  }
+
   base::Value* value = NULL;
   if (setting != CONTENT_SETTING_DEFAULT)
     value = base::Value::CreateIntegerValue(setting);
@@ -308,6 +316,72 @@ void HostContentSettingsMap::SetContentSetting(
                     value);
 }
 
+ContentSetting HostContentSettingsMap::GetContentSettingAndMaybeUpdateLastUsage(
+    const GURL& primary_url,
+    const GURL& secondary_url,
+    ContentSettingsType content_type,
+    const std::string& resource_identifier) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  ContentSetting setting = GetContentSetting(
+      primary_url, secondary_url, content_type, resource_identifier);
+  if (setting == CONTENT_SETTING_ALLOW) {
+    UpdateLastUsageByPattern(
+        ContentSettingsPattern::FromURLNoWildcard(primary_url),
+        ContentSettingsPattern::FromURLNoWildcard(secondary_url),
+        content_type);
+  }
+  return setting;
+}
+
+void HostContentSettingsMap::UpdateLastUsage(const GURL& primary_url,
+                                             const GURL& secondary_url,
+                                             ContentSettingsType content_type) {
+  UpdateLastUsageByPattern(
+      ContentSettingsPattern::FromURLNoWildcard(primary_url),
+      ContentSettingsPattern::FromURLNoWildcard(secondary_url),
+      content_type);
+}
+
+void HostContentSettingsMap::UpdateLastUsageByPattern(
+    const ContentSettingsPattern& primary_pattern,
+    const ContentSettingsPattern& secondary_pattern,
+    ContentSettingsType content_type) {
+  UsedContentSettingsProviders();
+
+  static_cast<content_settings::PrefProvider*>(
+      content_settings_providers_[PREF_PROVIDER])
+      ->UpdateLastUsage(primary_pattern, secondary_pattern, content_type);
+}
+
+base::Time HostContentSettingsMap::GetLastUsage(
+    const GURL& primary_url,
+    const GURL& secondary_url,
+    ContentSettingsType content_type) {
+  return GetLastUsageByPattern(
+      ContentSettingsPattern::FromURLNoWildcard(primary_url),
+      ContentSettingsPattern::FromURLNoWildcard(secondary_url),
+      content_type);
+}
+
+base::Time HostContentSettingsMap::GetLastUsageByPattern(
+    const ContentSettingsPattern& primary_pattern,
+    const ContentSettingsPattern& secondary_pattern,
+    ContentSettingsType content_type) {
+  UsedContentSettingsProviders();
+
+  return static_cast<content_settings::PrefProvider*>(
+             content_settings_providers_[PREF_PROVIDER])
+      ->GetLastUsage(primary_pattern, secondary_pattern, content_type);
+}
+
+void HostContentSettingsMap::SetPrefClockForTesting(base::Clock* clock) {
+  UsedContentSettingsProviders();
+
+  static_cast<content_settings::PrefProvider*>(
+      content_settings_providers_[PREF_PROVIDER])->SetClockForTesting(clock);
+}
+
 void HostContentSettingsMap::AddExceptionForURL(
     const GURL& primary_url,
     const GURL& secondary_url,