Remove X-Retry-After support.

net/url_request/url_request_throttler_unittest.cc

Index: net/url_request/url_request_throttler_unittest.cc
diff --git a/net/url_request/url_request_throttler_unittest.cc b/net/url_request/url_request_throttler_unittest.cc
index 8ea46b0552b573f52b4ded3c21fc3a477f74465b..88243db45d37226d3b01334b23a1af2daef399e1 100644
--- a/net/url_request/url_request_throttler_unittest.cc
+++ b/net/url_request/url_request_throttler_unittest.cc
@@ -180,7 +180,6 @@ class URLRequestThrottlerEntryTest : public testing::Test {
 
 // List of all histograms we care about in these unit tests.
 const char* kHistogramNames[] = {
-  "Throttling.CustomRetryAfterMs",
   "Throttling.FailureCountAtSuccess",
   "Throttling.PerceivedDowntime",
   "Throttling.RequestThrottled",
@@ -255,26 +254,6 @@ TEST_F(URLRequestThrottlerEntryTest, InterfaceNotDuringExponentialBackoff) {
   ASSERT_EQ(0, samples_["Throttling.RequestThrottled"].counts(1));
 }
 
-TEST_F(URLRequestThrottlerEntryTest, InterfaceUpdateRetryAfter) {
-  // If the response we received has a retry-after field,
-  // the request should be delayed.
-  MockURLRequestThrottlerHeaderAdapter header_w_delay_header("5.5", "", 200);
-  entry_->UpdateWithResponse("", &header_w_delay_header);
-  EXPECT_GT(entry_->GetExponentialBackoffReleaseTime(), entry_->fake_time_now_)
-      << "When the server put a positive value in retry-after we should "
-         "increase release_time";
-
-  entry_->ResetToBlank(now_);
-  MockURLRequestThrottlerHeaderAdapter header_w_negative_header(
-      "-5.5", "", 200);
-  entry_->UpdateWithResponse("", &header_w_negative_header);
-  EXPECT_EQ(entry_->GetExponentialBackoffReleaseTime(), entry_->fake_time_now_)
-      << "When given a negative value, it should not change the release_time";
-
-  CalculateHistogramDeltas();
-  ASSERT_EQ(1, samples_["Throttling.CustomRetryAfterMs"].TotalCount());
-}
-
 TEST_F(URLRequestThrottlerEntryTest, InterfaceUpdateFailure) {
   MockURLRequestThrottlerHeaderAdapter failure_response(503);
   entry_->UpdateWithResponse("", &failure_response);