Implement a runtime headless mode for Linux

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 1699 matching lines @@
     switches::kEnableWebFontsInterventionV2,
     switches::kEnableWebGLDraftExtensions,
     switches::kEnableWebGLImageChromium,
     switches::kEnableWebVR,
     switches::kExplicitlyAllowedPorts,
     switches::kForceDeviceScaleFactor,
     switches::kForceDisplayList2dCanvas,
     switches::kEnableCanvas2dDynamicRenderingModeSwitching,
     switches::kForceOverlayFullscreenVideo,
     switches::kFullMemoryCrashReport,
+    switches::kHeadless,
     switches::kInertVisualViewport,
     switches::kIPCConnectionTimeout,
     switches::kIsRunningInMash,
     switches::kJavaScriptFlags,
     switches::kLoggingLevel,
     switches::kMainFrameResizesAreOrientationChanges,
     switches::kMaxUntiledLayerWidth,
     switches::kMaxUntiledLayerHeight,
     switches::kMemoryMetrics,
     switches::kMojoLocalStorage,
@@ skipping 1269 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing. Alias
   // enough information here so that we can determine what the bad message was.
   base::debug::Alias(&error);
   bad_message::ReceivedBadMessage(render_process_id,
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content