Initial patch set to implement improved touch support for screen magnification

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 df6710779c7e8612115e41d4f6acc1c534414745..f1ed8ca7e0c5f86f2f178f3306f24296b39f5c98 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2179,7 +2179,15 @@ const FeatureEntry kFeatureEntries[] = {
 #endif  // OS_ANDROID
     {"enable-faster-location-reload", IDS_FLAGS_FASTER_LOCATION_RELOAD_NAME,
      IDS_FLAGS_FASTER_LOCATION_RELOAD_DESCRIPTION, kOsAll,
-     FEATURE_VALUE_TYPE(features::kFasterLocationReload)}
+     FEATURE_VALUE_TYPE(features::kFasterLocationReload)},
+#if defined(OS_CHROMEOS)
+    {"enable-touch-support-for-screen-magnification",

[yoshiki, 2017/01/20 05:26:33]

Optional: The feature name is "screen magnifier", so I think
"for-screen-magnifier" is better. But the decision is up to you.

[yawano, 2017/02/06 06:49:04]

Done.

+     IDS_FLAGS_ENABLE_TOUCH_SUPPORT_FOR_SCREEN_MAGNIFICATION_NAME,
+     IDS_FLAGS_ENABLE_TOUCH_SUPPORT_FOR_SCREEN_MAGNIFICATION_DESCRIPTION,
+     kOsCrOS,
+     SINGLE_VALUE_TYPE(
+         chromeos::switches::kEnableTouchSupportForScreenMagnification)}
+#endif  // OS_CHROMEOS
 
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in