Remove the HANDLED_EXTERNALLY status code.

net/url_request/url_request_status.h

Index: net/url_request/url_request_status.h
diff --git a/net/url_request/url_request_status.h b/net/url_request/url_request_status.h
index 1e497ab4df6babc5a910ae202d3e5f4f3d67e4bd..2d282d149009700fa9a511be90f1af7feb495769 100644
--- a/net/url_request/url_request_status.h
+++ b/net/url_request/url_request_status.h
@@ -23,11 +23,6 @@ class URLRequestStatus {
     // completed.
     IO_PENDING,
 
-    // Request was successful but was handled by an external program, so there
-    // is no response data. This usually means the current page should not be
-    // navigated, but no error should be displayed. |error_| will be 0.
-    HANDLED_EXTERNALLY,
-
     // Request was cancelled programatically.
     CANCELED,
 
@@ -45,9 +40,7 @@ class URLRequestStatus {
   void set_error(int e) { error_ = e; }
 
   // Returns true if the status is success, which makes some calling code more
-  // convenient because this is the most common test. Note that we do NOT treat
-  // HANDLED_EXTERNALLY as success. For everything except user notifications,
-  // this value should be handled like an error (processing should stop).
+  // convenient because this is the most common test.
   bool is_success() const {
     return status_ == SUCCESS || status_ == IO_PENDING;
   }