Add chrome_split_dll gyp variable, and duplicate chrome_main_dll target

content/app/content_main_runner.cc

Index: content/app/content_main_runner.cc
diff --git a/content/app/content_main_runner.cc b/content/app/content_main_runner.cc
index 9f1947a06e8b464bf6a654a650f428d52000c3bf..cf17c00aa69ec49ecbc659bd8ab01f5826349289 100644
--- a/content/app/content_main_runner.cc
+++ b/content/app/content_main_runner.cc
@@ -299,6 +299,7 @@ class ContentClientInitializer {
         content_client->plugin_ = delegate->CreateContentPluginClient();
       if (!content_client->plugin_)
         content_client->plugin_ = &g_empty_content_plugin_client.Get();
+#if !defined(CHROME_SPLIT_DLL)
     } else if (process_type == switches::kRendererProcess ||
                CommandLine::ForCurrentProcess()->HasSwitch(
                    switches::kSingleProcess)) {
@@ -306,6 +307,7 @@ class ContentClientInitializer {
         content_client->renderer_ = delegate->CreateContentRendererClient();
       if (!content_client->renderer_)
         content_client->renderer_ = &g_empty_content_renderer_client.Get();
+#endif
     } else if (process_type == switches::kUtilityProcess) {
       if (delegate)
         content_client->utility_ = delegate->CreateContentUtilityClient();
@@ -401,14 +403,22 @@ int RunNamedProcessTypeMain(
     ContentMainDelegate* delegate) {
   static const MainFunction kMainFunctions[] = {
     { "",                            BrowserMain },
-    { switches::kRendererProcess,    RendererMain },
 #if defined(ENABLE_PLUGINS)
     { switches::kPluginProcess,      PluginMain },
+    // TODO(scottmg): http://crbug.com/237249 This will have to be split into
+    // content_main_runner_browser and content_main_runner_child.
+#if !defined(CHROME_SPLIT_DLL)
     { switches::kWorkerProcess,      WorkerMain },
+#endif
     { switches::kPpapiPluginProcess, PpapiPluginMain },
     { switches::kPpapiBrokerProcess, PpapiBrokerMain },
 #endif
     { switches::kUtilityProcess,     UtilityMain },
+    // TODO(scottmg): http://crbug.com/237249 This will have to be split into
+    // content_main_runner_browser and content_main_runner_child.
+#if !defined(CHROME_SPLIT_DLL)
+    { switches::kRendererProcess,    RendererMain },
+#endif
     { switches::kGpuProcess,         GpuMain },
   };