[sensors] Add Permission guard to the generic sensor apis.

chrome/browser/ui/webui/options/content_settings_handler.cc

Index: chrome/browser/ui/webui/options/content_settings_handler.cc
diff --git a/chrome/browser/ui/webui/options/content_settings_handler.cc b/chrome/browser/ui/webui/options/content_settings_handler.cc
index 757ec244d3c5e7d3ae691d216fd6a4e6f4ee0761..836350bddcae35ce9e8f19a8f2f681dc4f3bb822 100644
--- a/chrome/browser/ui/webui/options/content_settings_handler.cc
+++ b/chrome/browser/ui/webui/options/content_settings_handler.cc
@@ -185,6 +185,7 @@ const ExceptionsInfoMap& GetExceptionsInfoMap() {
         ContentSettingWithExceptions(
             false,
             UserMetricsAction("Options_DefaultMIDISysExSettingChanged"))));
+    // TODO(riju): Add sensor metrics when UMA is added.
     exceptions_info_map.insert(std::make_pair(
         CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC,
         ContentSettingWithExceptions(
@@ -464,6 +465,12 @@ void ContentSettingsHandler::GetLocalizedValues(
     {"midiSysExAllow", IDS_MIDI_SYSEX_ALLOW_RADIO},
     {"midiSysExAsk", IDS_MIDI_SYSEX_ASK_RADIO},
     {"midiSysExBlock", IDS_MIDI_SYSEX_BLOCK_RADIO},
+    // Sensors filter.
+    {"sensorsHeader", IDS_SENSORS_TAB_LABEL},
+    {"sensorsAllow", IDS_SENSORS_ALLOW_RADIO},
+    {"sensorsAsk", IDS_SENSORS_ASK_RADIO},
+    {"sensorsBlock", IDS_SENSORS_BLOCK_RADIO},
+
     // Push messaging strings.
     {"pushMessagingHeader", IDS_PUSH_MESSAGES_TAB_LABEL},
     {"pushMessagingAllow", IDS_PUSH_MESSSAGING_ALLOW_RADIO},
@@ -545,6 +552,7 @@ void ContentSettingsHandler::GetLocalizedValues(
                 IDS_AUTOMATIC_DOWNLOADS_TAB_LABEL);
   RegisterTitle(localized_strings, "midi-sysex",
                 IDS_MIDI_SYSEX_TAB_LABEL);
+  RegisterTitle(localized_strings, "sensors", IDS_SENSORS_TAB_LABEL);
   RegisterTitle(localized_strings, "usb-devices",
                 IDS_USB_DEVICES_HEADER_AND_TAB_LABEL);
   RegisterTitle(localized_strings, "background-sync",
@@ -809,6 +817,8 @@ void ContentSettingsHandler::UpdateExceptionsViewFromModel(
     UpdateExceptionsViewFromHostContentSettingsMap(type);
   } else if (type == CONTENT_SETTINGS_TYPE_MIDI_SYSEX) {
     UpdateMIDISysExExceptionsView();
+  } else if (type == CONTENT_SETTINGS_TYPE_SENSORS) {
+    UpdateSensorsExceptionsView();
   } else {
     UpdateExceptionsViewFromHostContentSettingsMap(type);
   }
@@ -973,6 +983,11 @@ void ContentSettingsHandler::UpdateMIDISysExExceptionsView() {
       CONTENT_SETTINGS_TYPE_MIDI_SYSEX);
 }
 
+void ContentSettingsHandler::UpdateSensorsExceptionsView() {
+  UpdateSettingDefaultFromModel(CONTENT_SETTINGS_TYPE_SENSORS);
+  UpdateExceptionsViewFromHostContentSettingsMap(CONTENT_SETTINGS_TYPE_SENSORS);
+}
+
 void ContentSettingsHandler::UpdateAllChooserExceptionsViewsFromModel() {
   for (const site_settings::ChooserTypeNameEntry& chooser_type :
       site_settings::kChooserTypeGroupNames)