Implement PluginsPermissionContext and hookup to flash download interception.

chrome/browser/permissions/permission_uma_util.cc

Index: chrome/browser/permissions/permission_uma_util.cc
diff --git a/chrome/browser/permissions/permission_uma_util.cc b/chrome/browser/permissions/permission_uma_util.cc
index 84501e8e6f2edef29b5eab0686aea92e800901a4..acc7d4899d8b457046ccde1b1c32b0b3d0c751da 100644
--- a/chrome/browser/permissions/permission_uma_util.cc
+++ b/chrome/browser/permissions/permission_uma_util.cc
@@ -672,8 +672,7 @@ void PermissionUmaUtil::RecordPermissionAction(
     case PermissionType::FLASH:
       PERMISSION_ACTION_UMA(secure_origin, "Permissions.Action.Flash",
                             "Permissions.Action.SecureOrigin.Flash",
-                            "Permissions.Action.InsecureOrigin.Flash",
-                            action);
+                            "Permissions.Action.InsecureOrigin.Flash", action);
       break;
     // The user is not prompted for these permissions, thus there is no
     // permission action recorded for them.