Revert "Support a prebuilt WebView."

To work around framework resource IDs not being constant, go back to
building webviewchromium.jar from source.

This reverts commit 9c9341f1d2368b4209fe982f3f1c5de384f67fb7.

Bug: 11426593
Import translations. DO NOT MERGE

Change-Id: Ie9541d4a4a1dd1ddab22aecaf6243d6837b91fdb
Auto-generated-cl: translation import
Merge tag 'android-4.4.1_r1' into HEAD

Android 4.4.1 Release 1