Remove 'throwUninformativeAndGenericTypeError'.

      This patch removes the last few calls to the generic TypeError throwing
method, which means we can remove it entirely. Yay.

BUG=270033

Review URL: https://codereview.chromium.org/100113007

git-svn-id: svn://svn.chromium.org/blink/trunk@164677 bbb929c8-8fbe-4397-9dbb-9b2b20218538