Disable RefreshThrottlerTest.{QuotaIsPerDay,RollOver}

These failed on build bots probably due to the end of DST.

TBR=skym@chromium.org,fgorski@chromium.org,pnoland@chromium.org

Bug: 901698
Change-Id: I2b8231a71f483f38b161f012f7c081e35232c9a6
Reviewed-on: https://chromium-review.googlesource.com/c/1317109Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Commit-Queue: Kunihiko Sakamoto <ksakamoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605230}

components/feed/core/refresh_throttler_unittest.cc

@@ -49,7 +49,8 @@ TEST_F(RefreshThrottlerTest, QuotaExceeded) {
   EXPECT_FALSE(throttler_->RequestQuota());
 }
 
-TEST_F(RefreshThrottlerTest, QuotaIsPerDay) {
+// Disabled since this is not robust against DST https://crbug.com/901698
+TEST_F(RefreshThrottlerTest, DISABLED_QuotaIsPerDay) {
   EXPECT_TRUE(throttler_->RequestQuota());
   EXPECT_TRUE(throttler_->RequestQuota());
   EXPECT_FALSE(throttler_->RequestQuota());
@@ -58,7 +59,8 @@ TEST_F(RefreshThrottlerTest, QuotaIsPerDay) {
   EXPECT_TRUE(throttler_->RequestQuota());
 }
 
-TEST_F(RefreshThrottlerTest, RollOver) {
+// Disabled since this is not robust against DST https://crbug.com/901698
+TEST_F(RefreshThrottlerTest, DISABLED_RollOver) {
   // Exhaust our quota so the for loop can verify everything as false.
   EXPECT_TRUE(throttler_->RequestQuota());
   EXPECT_TRUE(throttler_->RequestQuota());