Merge "Fix mac build for nativebridge tests."

static constexpr const char* kTestData = "PreInitializeNativeBridge test.";

TEST_F(NativeBridgeTest, PreInitializeNativeBridge) {

#ifndef __APPLE_         // Mac OS does not support bind-mount.

#ifndef __APPLE__         // Mac OS does not support bind-mount.

#ifndef HAVE_ANDROID_OS   // Cannot write into the hard-wired location.

    // Try to create our mount namespace.

    if (unshare(CLONE_NEWNS) != -1) {