[scheduler] Throttle background frames with 1% CPU limit

chrome/browser/about_flags.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 2085 matching lines @@
     {"arc-use-auth-endpoint", IDS_FLAGS_ARC_USE_AUTH_ENDPOINT_NAME,
      IDS_FLAGS_ARC_USE_AUTH_ENDPOINT_DESCRIPTION, kOsCrOS,
      SINGLE_VALUE_TYPE_AND_VALUE(
          chromeos::switches::kArcUseAuthEndpoint,
          "https://www-googleapis-staging.sandbox.google.com/oauth2/v4/"
          "ExchangeToken")},
 #endif  // OS_CHROMEOS
     {"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.
 };
 
 class FlagsStateSingleton {
  public:
   FlagsStateSingleton()
       : flags_state_(kFeatureEntries, arraysize(kFeatureEntries)) {}
   ~FlagsStateSingleton() {}
@@ skipping 188 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags