Initialize FontConfigIPC when zygote is disabled so font fallback works.

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1636 matching lines @@
   // Now send any options from our own command line we want to propagate.
   const base::CommandLine& browser_command_line =
       *base::CommandLine::ForCurrentProcess();
   PropagateBrowserCommandLineToRenderer(browser_command_line, command_line);
 
   // Pass on the browser locale.
   const std::string locale =
       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());
 
   if (IsPinchToZoomEnabled())
     command_line->AppendSwitch(switches::kEnablePinch);
 
 #if defined(OS_WIN)
   command_line->AppendSwitchASCII(
       switches::kDeviceScaleFactor,
       base::DoubleToString(display::win::GetDPIScale()));
@@ skipping 121 matching lines @@
     switches::kLoggingLevel,
     switches::kMainFrameResizesAreOrientationChanges,
     switches::kMaxUntiledLayerWidth,
     switches::kMaxUntiledLayerHeight,
     switches::kMemoryMetrics,
     switches::kMojoLocalStorage,
     switches::kMSEAudioBufferSizeLimit,
     switches::kMSEVideoBufferSizeLimit,
     switches::kNoReferrers,
     switches::kNoSandbox,
+    switches::kNoZygote,
     switches::kOverridePluginPowerSaverForTesting,
     switches::kPassiveListenersDefault,
     switches::kPpapiInProcess,
     switches::kProfilerTiming,
     switches::kReducedReferrerGranularity,
     switches::kReduceSecurityForTesting,
     switches::kRegisterPepperPlugins,
     switches::kRendererStartupDialog,
     switches::kRootLayerScrolls,
     switches::kShowPaintRects,
@@ skipping 1268 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing.
   // Capture the error message in a crash key value.
   base::debug::ScopedCrashKey error_key_value("mojo-message-error", error);
   bad_message::ReceivedBadMessage(render_process_id,
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content