Start app shim when app launched.

apps/app_shim/switches.cc

Index: apps/app_shim/switches.cc
diff --git a/android_webview/common/aw_switches.cc b/apps/app_shim/switches.cc
similarity index 50%
copy from android_webview/common/aw_switches.cc
copy to apps/app_shim/switches.cc
index 43d850393859bc6cfb3c79e9afeda2084b0af3d5..06fc2551ad56dbb9abad5e430b812f1168c49900 100644
--- a/android_webview/common/aw_switches.cc
+++ b/apps/app_shim/switches.cc
@@ -2,13 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "android_webview/common/aw_switches.h"
+#include "apps/app_shim/switches.h"
 
+namespace app_shim {
 namespace switches {
 
-const char kNoMergeUIAndRendererCompositorThreads[] =
-    "no-merge-ui-and-compositor-threads";
-
-const char kUseZeroCopyBuffers[] = "use-zero-copy-buffers";
+// Signifies to the app shim that it shouldn't request that the app be
+// launched.
+const char kNoLaunchApp[] = "no-launch-app";
 
 }  // namespace switches
+}  // namespace app_shim