Update webkit_resources to support high-dpi assets

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 0e2ab19a4db5bd1cf5e91f98d477e321d22554e3..f34df1c078fa1206a19b238d0d860a8cc0bf5c24 100644
--- a/content/browser/zygote_host/zygote_host_impl_linux.cc
+++ b/content/browser/zygote_host/zygote_host_impl_linux.cc
@@ -33,6 +33,7 @@
 #include "content/public/common/result_codes.h"
 #include "sandbox/linux/suid/client/setuid_sandbox_client.h"
 #include "sandbox/linux/suid/common/sandbox.h"
+#include "ui/base/ui_base_switches.h"
 
 #if defined(USE_TCMALLOC)
 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
@@ -100,6 +101,10 @@ void ZygoteHostImpl::Init(const std::string& sandbox_cmd) {
     switches::kRegisterPepperPlugins,
     switches::kDisableSeccompSandbox,
     switches::kEnableSeccompSandbox,
+    // Zygote process needs to know what resources to have loaded when it
+    // becomes a renderer process.
+    switches::kForceDeviceScaleFactor,
+    switches::kLoad2xResources,
   };
   cmd_line.CopySwitchesFrom(browser_command_line, kForwardSwitches,
                             arraysize(kForwardSwitches));