Add permission request creator class.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 13aa5b9bc0b69edfbbb4599a7326833032392d67..844f57c00f8a344ff8213d2fc0a36304633958f5 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -986,6 +986,11 @@ const char kParentProfile[]                 = "parent-profile";
 // default interval is used).
 const char kPerformanceMonitorGathering[]   = "performance-monitor-gathering";
 
+// Development flag for permission request API. This flag is needed until
+// the API is finalized.
+// TODO(akuegel): Remove when this flag is not needed anymore.
+const char kPermissionRequestApiUrl[] = "permission-request-api-url";
+
 // Read previously recorded data from the cache. Only cached data is read.
 // See kRecordMode.
 const char kPlaybackMode[]                  = "playback-mode";