Remove X-Retry-After support.

net/url_request/url_request_throttler_entry.cc

Index: net/url_request/url_request_throttler_entry.cc
diff --git a/net/url_request/url_request_throttler_entry.cc b/net/url_request/url_request_throttler_entry.cc
index 3ef2db0a1d685348099fc5c8f831f16624568feb..3154f9c04d58e812c578a3483f4f6c79b2de58d8 100644
--- a/net/url_request/url_request_throttler_entry.cc
+++ b/net/url_request/url_request_throttler_entry.cc
@@ -44,7 +44,6 @@ const double URLRequestThrottlerEntry::kDefaultMultiplyFactor = 1.4;
 const double URLRequestThrottlerEntry::kDefaultJitterFactor = 0.4;
 const int URLRequestThrottlerEntry::kDefaultMaximumBackoffMs = 15 * 60 * 1000;
 const int URLRequestThrottlerEntry::kDefaultEntryLifetimeMs = 2 * 60 * 1000;
-const char URLRequestThrottlerEntry::kRetryHeaderName[] = "X-Retry-After";
 const char URLRequestThrottlerEntry::kExponentialThrottlingHeader[] =
     "X-Chrome-Exponential-Throttling";
 const char URLRequestThrottlerEntry::kExponentialThrottlingDisableValue[] =
@@ -75,27 +74,6 @@ class RejectedRequestParameters : public NetLog::EventParameters {
   int release_after_ms_;
 };
 
-// NetLog parameters when a response contains an X-Retry-After header.
-class RetryAfterParameters : public NetLog::EventParameters {
- public:
-  RetryAfterParameters(const std::string& url_id,
-                       int retry_after_ms)
-      : url_id_(url_id),
-        retry_after_ms_(retry_after_ms) {
-  }
-
-  virtual Value* ToValue() const {
-    DictionaryValue* dict = new DictionaryValue();
-    dict->SetString("url", url_id_);
-    dict->SetInteger("retry_after_ms", retry_after_ms_);
-    return dict;
-  }
-
- private:
-  std::string url_id_;
-  int retry_after_ms_;
-};
-
 URLRequestThrottlerEntry::URLRequestThrottlerEntry(
     URLRequestThrottlerManager* manager,
     const std::string& url_id)
@@ -264,10 +242,6 @@ void URLRequestThrottlerEntry::UpdateWithResponse(
   } else {
     GetBackoffEntry()->InformOfRequest(true);
 
-    std::string retry_header = response->GetNormalizedValue(kRetryHeaderName);
-    if (!retry_header.empty())
-      HandleCustomRetryAfter(retry_header);
-
     std::string throttling_header = response->GetNormalizedValue(
         kExponentialThrottlingHeader);
     if (!throttling_header.empty())
@@ -337,36 +311,6 @@ base::TimeTicks URLRequestThrottlerEntry::ImplGetTimeNow() const {
   return base::TimeTicks::Now();
 }
 
-void URLRequestThrottlerEntry::HandleCustomRetryAfter(
-    const std::string& header_value) {
-  // Input parameter is the number of seconds to wait in a floating point value.
-  double time_in_sec = 0;
-  bool conversion_is_ok = base::StringToDouble(header_value, &time_in_sec);
-
-  // Conversion of custom retry-after header value failed.
-  if (!conversion_is_ok)
-    return;
-
-  // We must use an int value later so we transform this in milliseconds.
-  int64 value_ms = static_cast<int64>(0.5 + time_in_sec * 1000);
-
-  // We do not check for an upper bound; the server can set any Retry-After it
-  // desires. Recovery from error would involve restarting the browser.
-  if (value_ms < 0)
-    return;
-
-  net_log_.AddEvent(
-      NetLog::TYPE_THROTTLING_GOT_CUSTOM_RETRY_AFTER,
-      make_scoped_refptr(new RetryAfterParameters(url_id_, value_ms)));
-
-  base::TimeDelta value = base::TimeDelta::FromMilliseconds(value_ms);
-  GetBackoffEntry()->SetCustomReleaseTime(ImplGetTimeNow() + value);
-
-  UMA_HISTOGRAM_CUSTOM_TIMES(
-      "Throttling.CustomRetryAfterMs", value,
-      base::TimeDelta::FromSeconds(1), base::TimeDelta::FromHours(12), 50);
-}
-
 void URLRequestThrottlerEntry::HandleThrottlingHeader(
     const std::string& header_value,
     const std::string& host) {