DialogBrowserTest implementation to invoke Content settings bubble dialogs.

chrome/browser/ui/content_settings/content_setting_image_model.h

Index: chrome/browser/ui/content_settings/content_setting_image_model.h
diff --git a/chrome/browser/ui/content_settings/content_setting_image_model.h b/chrome/browser/ui/content_settings/content_setting_image_model.h
index ded59c1681d84d78ee254c8a83433136f2e908d3..8db43357afda75df66aa7f02594cc892dd9fdb4c 100644
--- a/chrome/browser/ui/content_settings/content_setting_image_model.h
+++ b/chrome/browser/ui/content_settings/content_setting_image_model.h
@@ -64,6 +64,10 @@ class ContentSettingImageModel {
   int explanatory_string_id() const { return explanatory_string_id_; }
   const base::string16& get_tooltip() const { return tooltip_; }
 
+  // For testing only. If this image model has a content type, it is returned
+  // here. Otherwise, CONTENT_SETTINGS_TYPE_DEFAULT is returned.
+  virtual ContentSettingsType GetContentType();

[tapted, 2017/02/03 23:07:02]

This still violates
https://chromium.googlesource.com/chromium/src/+/master/styleguide/c++/c++.md...,
so we should try harder to avoid it.

+
  protected:
   ContentSettingImageModel();
 
@@ -102,13 +106,12 @@ class ContentSettingSimpleImageModel : public ContentSettingImageModel {
   bool ShouldRunAnimation(content::WebContents* web_contents) override;
   void SetAnimationHasRun(content::WebContents* web_contents) override;
 
+  ContentSettingsType GetContentType() override;
+
   // Factory method. Used only for testing.
   static std::unique_ptr<ContentSettingImageModel>
   CreateForContentTypeForTesting(ContentSettingsType content_type);
 
- protected:
-  ContentSettingsType content_type() { return content_type_; }
-
  private:
   ContentSettingsType content_type_;