Pass touch layout related flags to zygote process.

content/browser/zygote_host/zygote_host_impl_linux.cc

Index: content/browser/zygote_host/zygote_host_impl_linux.cc
diff --git a/content/browser/zygote_host/zygote_host_impl_linux.cc b/content/browser/zygote_host/zygote_host_impl_linux.cc
index 79913b01344a8c090be7388264b76c377b486da2..6ef54874282fb8d0e882d01b08297705504cb1b3 100644
--- a/content/browser/zygote_host/zygote_host_impl_linux.cc
+++ b/content/browser/zygote_host/zygote_host_impl_linux.cc
@@ -102,9 +102,13 @@ void ZygoteHostImpl::Init(const std::string& sandbox_cmd) {
     switches::kDisableSeccompSandbox,
     switches::kDisableSeccompFilterSandbox,
     switches::kEnableSeccompSandbox,
+
     // Zygote process needs to know what resources to have loaded when it
     // becomes a renderer process.
+    switches::kEnableTouchEvents,
     switches::kForceDeviceScaleFactor,
+    switches::kTouchOptimizedUI,
+
     switches::kNoSandbox,
   };
   cmd_line.CopySwitchesFrom(browser_command_line, kForwardSwitches,