Add load flag indicating a request is probably the result of a user gesture.

net/url_request/url_request_throttler_entry.h

Index: net/url_request/url_request_throttler_entry.h
diff --git a/net/url_request/url_request_throttler_entry.h b/net/url_request/url_request_throttler_entry.h
index 10f1adc223be7f3b53b60ca98fe278282e3dc4f3..df03fb393aea0ee99a5293f9aa0aedeca721dcd6 100644
--- a/net/url_request/url_request_throttler_entry.h
+++ b/net/url_request/url_request_throttler_entry.h
@@ -97,7 +97,7 @@ class NET_API URLRequestThrottlerEntry
   void DetachManager();
 
   // Implementation of URLRequestThrottlerEntryInterface.
-  virtual bool IsDuringExponentialBackoff() const;
+  virtual bool ShouldRejectRequest(int load_flags) const;
   virtual int64 ReserveSendingTimeForNextRequest(
       const base::TimeTicks& earliest_time);
   virtual base::TimeTicks GetExponentialBackoffReleaseTime() const;
@@ -134,6 +134,11 @@ class NET_API URLRequestThrottlerEntry
   virtual const BackoffEntry* GetBackoffEntry() const;
   virtual BackoffEntry* GetBackoffEntry();
 
+  // Returns true if |load_flags| contains a flag that indicates an
+  // explicit request by the user to load the resource. We never
+  // throttle requests with such load flags.
+  static bool ExplicitUserRequest(const int load_flags);
+
   // Used by tests.
   base::TimeTicks sliding_window_release_time() const {
     return sliding_window_release_time_;