Update from https://crrev.com/308996

base/base_switches.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 "base/base_switches.h"
 
 namespace switches {
 
 // Disables the crash reporting.
 const char kDisableBreakpad[]               = "disable-breakpad";
 
 // Indicates that crash reporting should be enabled. On platforms where helper
 // processes cannot access to files needed to make this decision, this flag is
 // generated internally.
 const char kEnableCrashReporter[]           = "enable-crash-reporter";
 
 // Generates full memory crash dump.
 const char kFullMemoryCrashReport[]         = "full-memory-crash-report";
 
-// Force low-end device when set to 1;
-// Auto-detect low-end device when set to 2;
-// Force non-low-end device when set to other values or empty;
-const char kLowEndDeviceMode[]              = "low-end-device-mode";
+// Force low-end device mode when set.
+const char kEnableLowEndDeviceMode[]        = "enable-low-end-device-mode";
+
+// Force disabling of low-end device mode when set.
+const char kDisableLowEndDeviceMode[]       = "disable-low-end-device-mode";
 
 // Suppresses all error dialogs when present.
 const char kNoErrorDialogs[]                = "noerrdialogs";
 
 // When running certain tests that spawn child processes, this switch indicates
 // to the test framework that the current process is a child process.
 const char kTestChildProcess[]              = "test-child-process";
 
 // Gives the default maximal active V-logging level; 0 is the default.
 // Normally positive values are used for V-logging levels.
@@ skipping 33 matching lines @@
 const char kProfilerTimingDisabledValue[]   = "0";
 
 #if defined(OS_POSIX)
 // Used for turning on Breakpad crash reporting in a debug environment where
 // crash reporting is typically compiled but disabled.
 const char kEnableCrashReporterForTesting[] =
     "enable-crash-reporter-for-testing";
 #endif
 
 }  // namespace switches