[scheduler] Throttle background frames with 1% CPU limit

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 8c01371c200db0624324aebee1e473f33040bd77..baa99d1997b5ff8f7386bca1f1ff3d1ebcbf2642 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2103,6 +2103,10 @@ const FeatureEntry kFeatureEntries[] = {
     {"material-security-verbose", IDS_FLAGS_MATERIAL_SECURITY_VERBOSE_NAME,
      IDS_FLAGS_MATERIAL_SECURITY_VERBOSE_DESCRIPTION, kOsDesktop,
      MULTI_VALUE_TYPE(kSecurityVerboseChoices)},
+    {"expensive-background-timer-throttling",
+     IDS_FLAGS_EXPENSIVE_BACKGROUND_TIMER_THROTTLING_NAME,
+     IDS_FLAGS_EXPENSIVE_BACKGROUND_TIMER_THROTTLING_DESCRIPTION, kOsAll,
+     FEATURE_VALUE_TYPE(features::kExpensiveBackgroundTimerThrottling)},
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.