Clean up IconNTP-related code

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 79eeee2ffcf4a1e6665a8871fc4bfd83e2e16baa..028cfdb2dd42af190b9f8a16b254a34e6474ec2b 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1718,7 +1718,6 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kDisableGpuVsync,
     switches::kDisableLowResTiling,
     switches::kDisableHistogramCustomizer,
-    switches::kDisableIconNtp,
     switches::kDisableLCDText,
     switches::kDisableLocalStorage,
     switches::kDisableLogging,
@@ -1755,7 +1754,6 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kEnableGpuClientTracing,
     switches::kEnableGpuMemoryBufferVideoFrames,
     switches::kEnableGPUServiceLogging,
-    switches::kEnableIconNtp,
     switches::kEnableLowResTiling,
     switches::kEnableMediaSuspend,
     switches::kEnableInbandTextTracks,