Large timeouts between in-session portal detection attempts.

https://codereview.chromium.org/385553002/ uses BackoffEntry, but it requires a lot of changes, so it probably won't be merged to M37. I suggest to merge this small fix.

BUG=377725
TEST=manual

Review URL: https://codereview.chromium.org/383183002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283536 0039d316-1c4b-4281-b951-d872f2087c98

chromeos/network/portal_detector/OWNERS

+ygorshenin@chromium.org

chromeos/network/portal_detector/network_portal_detector_strategy.cc

@@ -75,10 +75,14 @@ class ErrorScreenStrategy : public PortalDetectorStrategy {
 class SessionStrategy : public PortalDetectorStrategy {
  public:
   static const int kFastDelayBetweenAttemptsSec = 1;
-  static const int kMaxFastAttempts = 3;
   static const int kFastAttemptTimeoutSec = 3;
+  static const int kMaxFastAttempts = 3;
 
-  static const int kSlowDelayBetweenAttemptsSec = 10;
+  static const int kNormalDelayBetweenAttemptsSec = 10;
+  static const int kNormalAttemptTimeoutSec = 5;
+  static const int kMaxNormalAttempts = 3;
+
+  static const int kSlowDelayBetweenAttemptsSec = 2 * 60;
   static const int kSlowAttemptTimeoutSec = 5;
 
   SessionStrategy() {}
@@ -90,22 +94,34 @@ class SessionStrategy : public PortalDetectorStrategy {
   virtual bool CanPerformAttemptAfterDetectionImpl() OVERRIDE { return true; }
   virtual base::TimeDelta GetDelayTillNextAttemptImpl() OVERRIDE {
     int delay;
-    if (delegate_->AttemptCount() < kMaxFastAttempts)
+    if (IsFastAttempt())
       delay = kFastDelayBetweenAttemptsSec;
+    else if (IsNormalAttempt())
+      delay = kNormalDelayBetweenAttemptsSec;
     else
       delay = kSlowDelayBetweenAttemptsSec;
     return AdjustDelay(base::TimeDelta::FromSeconds(delay));
   }
   virtual base::TimeDelta GetNextAttemptTimeoutImpl() OVERRIDE {
     int timeout;
-    if (delegate_->AttemptCount() < kMaxFastAttempts)
+    if (IsFastAttempt())
       timeout = kFastAttemptTimeoutSec;
+    else if (IsNormalAttempt())
+      timeout = kNormalAttemptTimeoutSec;
     else
       timeout = kSlowAttemptTimeoutSec;
     return base::TimeDelta::FromSeconds(timeout);
   }
 
  private:
+  bool IsFastAttempt() {
+    return delegate_->AttemptCount() < kMaxFastAttempts;
+  }
+
+  bool IsNormalAttempt() {
+    return delegate_->AttemptCount() < kMaxFastAttempts + kMaxNormalAttempts;
+  }
+
   DISALLOW_COPY_AND_ASSIGN(SessionStrategy);
 };