DialogBrowserTest implementation to invoke Content settings bubble dialogs.

chrome/browser/ui/views/location_bar/location_bar_view.h

Index: chrome/browser/ui/views/location_bar/location_bar_view.h
diff --git a/chrome/browser/ui/views/location_bar/location_bar_view.h b/chrome/browser/ui/views/location_bar/location_bar_view.h
index 54f184dee8ee9070f24879a5ca1ec7f707a12e1e..291a2d7f12d59d0d71d3a17b8b81dd4cbb0b85f4 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_view.h
+++ b/chrome/browser/ui/views/location_bar/location_bar_view.h
@@ -246,6 +246,7 @@ class LocationBarView : public LocationBar,
  private:
   using ContentSettingViews = std::vector<ContentSettingImageView*>;
 
+  friend class ContentSettingBubbleDialogTest;

[tapted, 2017/02/15 01:44:25]

(still fairly certain this isn't necessary)

[kylix_rd, 2017/02/15 16:42:59]

Done.

   friend class PageActionImageView;
   friend class PageActionWithBadgeView;
   using PageActions = std::vector<ExtensionAction*>;
@@ -356,6 +357,7 @@ class LocationBarView : public LocationBar,
   ExtensionAction* GetVisiblePageAction(size_t index) override;
   void TestPageActionPressed(size_t index) override;
   bool GetBookmarkStarVisibility() override;
+  bool TestContentSettingImagePressed(size_t index) override;
 
   // views::View:
   const char* GetClassName() const override;