Initialize FontConfigIPC when zygote is disabled so font fallback works.

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 1884d92a11831b77c0089f967ba8a5d4a29a1460..f40114b2235dec735acd1e4f344ebd6bf2ddd9bd 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1654,6 +1654,13 @@ void RenderProcessHostImpl::AppendRendererCommandLine(
       GetContentClient()->browser()->GetApplicationLocale();
   command_line->AppendSwitchASCII(switches::kLang, locale);
 
+  // A non-empty RendererCmdPrefix implies that Zygote is disabled.

[jam, 2017/05/05 00:21:22]

this is only when --no-zygote is specified right?

if so, i think no need to run this line. i.e. just keep line 1805 which will
forward it to the renderer

+  if (!base::CommandLine::ForCurrentProcess()
+           ->GetSwitchValueNative(switches::kRendererCmdPrefix)
+           .empty()) {
+    command_line->AppendSwitch(switches::kNoZygote);
+  }
+
   GetContentClient()->browser()->AppendExtraCommandLineSwitches(command_line,
                                                                 GetID());
 
@@ -1795,6 +1802,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kMSEVideoBufferSizeLimit,
     switches::kNoReferrers,
     switches::kNoSandbox,
+    switches::kNoZygote,
     switches::kOverridePluginPowerSaverForTesting,
     switches::kPassiveListenersDefault,
     switches::kPpapiInProcess,