Move mixed content settings histograms into browser

chrome/browser/content_settings/tab_specific_content_settings.h

Index: chrome/browser/content_settings/tab_specific_content_settings.h
diff --git a/chrome/browser/content_settings/tab_specific_content_settings.h b/chrome/browser/content_settings/tab_specific_content_settings.h
index c91de1052450532ac021af964fd6f658f0ef2b24..422cd32c3df665582c3a531d926d2105e218dc4b 100644
--- a/chrome/browser/content_settings/tab_specific_content_settings.h
+++ b/chrome/browser/content_settings/tab_specific_content_settings.h
@@ -385,6 +385,12 @@ class TabSpecificContentSettings
       bool is_iframe_srcdoc) override;
   void AppCacheAccessed(const GURL& manifest_url,
                         bool blocked_by_policy) override;
+  void OnTriedDisplayingInsecureContent(content::RenderFrameHost* rfh,
+                                        const GURL& origin,
+                                        const GURL& url) override;
+  void OnTriedRunningInsecureContent(content::RenderFrameHost* rfh,
+                                     const GURL& origin,
+                                     const GURL& url) override;
 
   // content_settings::Observer implementation.
   void OnContentSettingChanged(const ContentSettingsPattern& primary_pattern,