Content Shell: Move shell_layout_tests_android into layout_tests/.

BUG=420994

Review URL: https://codereview.chromium.org/661743002

Cr-Commit-Position: refs/heads/master@{#299892}
void EnsureCreateFIFO(const base::FilePath& path) {
  unlink(path.value().c_str());
  CHECK(base::android::CreateFIFO(path, 0666))
    << "Unable to create the Android's FIFO: " << path.value().c_str();
}

void EnsureCreateFIFO(const base::FilePath& path) {
  unlink(path.value().c_str());
  CHECK(base::android::CreateFIFO(path, 0666))
    << "Unable to create the Android's FIFO: " << path.value().c_str();
}
