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

chrome/browser/ui/content_settings/content_setting_image_model.cc

Index: chrome/browser/ui/content_settings/content_setting_image_model.cc
diff --git a/chrome/browser/ui/content_settings/content_setting_image_model.cc b/chrome/browser/ui/content_settings/content_setting_image_model.cc
index cea297bda3ad77b5f84cac658f4848af5f81767a..0debe818d4736c2a8339fbfd7ab08a7fa669d79f 100644
--- a/chrome/browser/ui/content_settings/content_setting_image_model.cc
+++ b/chrome/browser/ui/content_settings/content_setting_image_model.cc
@@ -97,6 +97,16 @@ class ContentSettingMIDISysExImageModel
   DISALLOW_COPY_AND_ASSIGN(ContentSettingMIDISysExImageModel);
 };
 
+class ContentSettingSensorImageModel : public ContentSettingSimpleImageModel {
+ public:
+  ContentSettingSensorImageModel();
+
+  void UpdateFromWebContents(WebContents* web_contents) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ContentSettingSensorImageModel);
+};
+
 namespace {
 
 struct ContentSettingsImageDetails {
@@ -192,6 +202,9 @@ ContentSettingSimpleImageModel::CreateForContentTypeForTesting(
   if (content_settings_type == CONTENT_SETTINGS_TYPE_MIDI_SYSEX)
     return base::MakeUnique<ContentSettingMIDISysExImageModel>();
 
+  if (content_settings_type == CONTENT_SETTINGS_TYPE_SENSORS)
+    return base::MakeUnique<ContentSettingSensorImageModel>();
+
   return base::MakeUnique<ContentSettingBlockedImageModel>(
       content_settings_type);
 }
@@ -502,6 +515,42 @@ void ContentSettingMIDISysExImageModel::UpdateFromWebContents(
                                             : IDS_MIDI_SYSEX_BLOCKED_TOOLTIP));
 }
 
+// Sensors ------------------------------------------------------------------
+
+ContentSettingSensorImageModel::ContentSettingSensorImageModel()
+    : ContentSettingSimpleImageModel(CONTENT_SETTINGS_TYPE_SENSORS) {}
+
+void ContentSettingSensorImageModel::UpdateFromWebContents(
+    WebContents* web_contents) {
+  set_visible(false);
+  if (!web_contents)
+    return;
+  TabSpecificContentSettings* content_settings =
+      TabSpecificContentSettings::FromWebContents(web_contents);
+  if (!content_settings)
+    return;
+  // TODO(riju): when UMA is ready
+  /*
+  const ContentSettingsUsagesState& usages_state =
+      content_settings->sensors_usages_state();
+  if (usages_state.state_map().empty())
+    return;
+  */
+  set_visible(true);
+
+  // If any embedded site has access the allowed icon takes priority over the
+  // blocked icon.
+  unsigned int state_flags = 0;
+  // usages_state.GetDetailedInfo(nullptr, &state_flags);
+  bool allowed =
+      !!(state_flags & ContentSettingsUsagesState::TABSTATE_HAS_ANY_ALLOWED);
+  set_icon_by_vector_id(gfx::VectorIconId::MIDI,  // TODO(riju)
+                        allowed ? gfx::VectorIconId::VECTOR_ICON_NONE
+                                : gfx::VectorIconId::BLOCKED_BADGE);
+  set_tooltip(l10n_util::GetStringUTF16(allowed ? IDS_SENSORS_ALLOWED_TOOLTIP
+                                                : IDS_SENSORS_BLOCKED_TOOLTIP));
+}
+
 // Base class ------------------------------------------------------------------
 
 gfx::Image ContentSettingImageModel::GetIcon(SkColor nearby_text_color) const {