Don't throttle web views until they've been in the background for 10s

third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl_unittest.cc

Index: third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl_unittest.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl_unittest.cc b/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl_unittest.cc
index 60eb0e60d39eda418e13f7ef65a878dcce247267..318e67b5ddc0d34b7ed3acd95539a184023d3120 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl_unittest.cc
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl_unittest.cc
@@ -106,6 +106,14 @@ TEST_F(WebFrameSchedulerImplTest, RepeatingTimer_PageInBackground) {
       1.0);
 
   mock_task_runner_->RunForPeriod(base::TimeDelta::FromSeconds(1));
+  EXPECT_EQ(1000, run_count);
+
+  // The task queue isn't throttled at all until it's been in the background for
+  // a 10 second grace period.
+  clock_->Advance(base::TimeDelta::FromSeconds(10));
+
+  run_count = 0;
+  mock_task_runner_->RunForPeriod(base::TimeDelta::FromSeconds(1));
   EXPECT_EQ(1, run_count);
 }
 
@@ -164,10 +172,19 @@ TEST_F(WebFrameSchedulerImplTest, PageInBackground_ThrottlingDisabled) {
       1.0);
 
   mock_task_runner_->RunForPeriod(base::TimeDelta::FromSeconds(1));
+  EXPECT_EQ(1000, run_count);
+
+  // The task queue isn't throttled at all until it's been in the background for
+  // a 10 second grace period.
+  clock_->Advance(base::TimeDelta::FromSeconds(10));
+
+  run_count = 0;
+  mock_task_runner_->RunForPeriod(base::TimeDelta::FromSeconds(1));
   EXPECT_EQ(1, run_count);
 }
 
-TEST_F(WebFrameSchedulerImplTest, RepeatingTimer_FrameHidden_CrossOrigin_ThrottlingDisabled) {
+TEST_F(WebFrameSchedulerImplTest,
+       RepeatingTimer_FrameHidden_CrossOrigin_ThrottlingDisabled) {
   RuntimeEnabledFeatures::setTimerThrottlingForHiddenFramesEnabled(false);
   web_frame_scheduler_->setFrameVisible(false);
   web_frame_scheduler_->setCrossOrigin(true);