Add a console message when a permission is embargoed due to repeated dismissals.

chrome/browser/permissions/permission_context_base.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/permissions/permission_context_base.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 90 matching lines @@
     if (result.source == PermissionStatusSource::KILL_SWITCH) {
       // Block the request and log to the developer console.
       web_contents->GetMainFrame()->AddMessageToConsole(
           content::CONSOLE_MESSAGE_LEVEL_INFO,
           base::StringPrintf(
               "%s permission has been blocked.",
               PermissionUtil::GetPermissionString(content_settings_type_)
                   .c_str()));
       callback.Run(CONTENT_SETTING_BLOCK);
       return;
+    } else if (result.source == PermissionStatusSource::MULTIPLE_DISMISSALS) {
+      web_contents->GetMainFrame()->AddMessageToConsole(
+          content::CONSOLE_MESSAGE_LEVEL_INFO,
+          base::StringPrintf(
+              "%s permission has been blocked as the user has dismissed the "
+              "permission prompt several times. See "
+              "https://www.chromestatus.com/features/6443143280984064 for more "
+              "information.",
+              PermissionUtil::GetPermissionString(content_settings_type_)
+                  .c_str()));

[raymes, 2017/02/28 23:44:38]

nit: it would be nice to get some of this logging logic out of the main flow of
the permission logic. Could we have a helper function which does logging? e.g.

LogPermissionBlockedMessage(WebContents* web_contents, const std::string&
message, ContentSettingsType type)?

We may also want to make the strings into constants.

[dominickn, 2017/03/01 02:28:44]

Done.

     }
 
     // If we are under embargo, record the embargo reason for which we have
     // suppressed the prompt.
     PermissionUmaUtil::RecordEmbargoPromptSuppressionFromSource(result.source);
     NotifyPermissionSet(id, requesting_origin, embedding_origin, callback,
                         false /* persist */, result.content_setting);
     return;
   }
 
@@ skipping 261 matching lines @@
                                       content_settings_storage_type(),
                                       std::string(), content_setting);
 }
 
 ContentSettingsType PermissionContextBase::content_settings_storage_type()
     const {
   if (content_settings_type_ == CONTENT_SETTINGS_TYPE_PUSH_MESSAGING)
     return CONTENT_SETTINGS_TYPE_NOTIFICATIONS;
   return content_settings_type_;
 }