Revert "Load web contents after tab is created."

This reverts commit 4c55f398def3214369aefa9f2f2e8f5940d3799d.

BUG=432562
TBR=tedchoc@chromium.org,jbudorick@chromium.org,sky@chromium.org

Review URL: https://codereview.chromium.org/894003005

Cr-Commit-Position: refs/heads/master@{#314469}
bool WebContentsAndroid::IsLoadingToDifferentDocument(JNIEnv* env,
                                                      jobject obj) const {
  return web_contents_->IsLoadingToDifferentDocument();
}

bool WebContentsAndroid::IsLoadingToDifferentDocument(JNIEnv* env,
                                                      jobject obj) const {
  return web_contents_->IsLoadingToDifferentDocument();
}
