blimp: Move compositing, input and render widget feature to client/core.

blimp/client/core/blimp_client_switches.h

Index: blimp/client/core/blimp_client_switches.h
diff --git a/blimp/client/core/blimp_client_switches.h b/blimp/client/core/blimp_client_switches.h
index 50b88cfcb1f5bf0ccb0ee43f655d54496568164f..d1c9dd191698ea5b0e2f5c463a8e201f9cb7beb2 100644
--- a/blimp/client/core/blimp_client_switches.h
+++ b/blimp/client/core/blimp_client_switches.h
@@ -33,6 +33,10 @@ extern const char kEngineTransport[];
 // Enables downloading the complete page from the engine.
 extern const char kDownloadWholeDocument[];
 
+// Enables rendering the contents of a tab to a native widget directly. This is
+// used by the standalone app.
+extern const char kUseInternalDisplay[];
+
 }  // namespace switches
 }  // namespace blimp