Move SocketsTcpApiTest.SocketsTcpCreateGood to app_shell_browsertests.

extensions/common/test_util.h

Index: extensions/common/test_util.h
diff --git a/extensions/common/test_util.h b/extensions/common/test_util.h
index 54d985be472cbb7c42e3a26b17b726045d92357c..46ac5d08c3f266ee773e84ed878a611a3b16dd74 100644
--- a/extensions/common/test_util.h
+++ b/extensions/common/test_util.h
@@ -23,6 +23,10 @@ namespace test_util {
 // Adds an extension manifest to a builder.
 ExtensionBuilder& BuildExtension(ExtensionBuilder& builder);
 
+// Creates an extension instance that can be attached to an ExtensionFunction
+// before running it.
+scoped_refptr<Extension> CreateEmptyExtension();
+
 // Return a very simple extension with a given |id|.
 scoped_refptr<Extension> CreateExtensionWithID(const std::string& id);