Add shortcut keys to ui scaling

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 19c9643bd06d715d2ea8249a40eac56a3d2a20d6..3c5c124e7aefe1295b52c3d829130581889a958b 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -187,16 +187,6 @@ const Experiment::Choice kChromeCaptivePortalDetectionChoices[] = {
     switches::kDisableChromeCaptivePortalDetector, ""}
 };
 
-const Experiment::Choice kAshInternalDisplayUIScaleChoices[] = {
-  { IDS_FLAGS_ASH_INTERNAL_DISPLAY_SCALE_DEFAULT, "", "" },
-  { IDS_FLAGS_ASH_INTERNAL_DISPLAY_SCALE_80,
-    ash::switches::kAshInternalDisplayUIScale, "0.8"},
-  { IDS_FLAGS_ASH_INTERNAL_DISPLAY_SCALE_125,
-    ash::switches::kAshInternalDisplayUIScale, "1.25"},
-  { IDS_FLAGS_ASH_INTERNAL_DISPLAY_SCALE_150,
-    ash::switches::kAshInternalDisplayUIScale, "1.5"},
-};
-
 #endif
 
 const Experiment::Choice kImplSidePaintingChoices[] = {
@@ -1023,13 +1013,6 @@ const Experiment kExperiments[] = {
     kOsCrOS,
     SINGLE_VALUE_TYPE(switches::kForceFullscreenApp),
   },
-  {
-    "ash-internal-display-ui-scale",
-    IDS_FLAGS_ASH_INTERNAL_DISPLAY_SCALE_NAME,
-    IDS_FLAGS_ASH_INTERNAL_DISPLAY_SCALE_DESCRIPTION,
-    kOsCrOS,
-    MULTI_VALUE_TYPE(kAshInternalDisplayUIScaleChoices)
-  },
 #endif  // defined(OS_CHROMEOS)
   {
     "views-textfield",