Revert 160959 - [android_webview] Use AwContents loadUrl method instead of ContentViewCore.

This introduces a loadUrl method on AwContents and modifies all of
our test code to use that method instead of the on ContentViewCore.

BUG=154558


Review URL: https://chromiumcodereview.appspot.com/11028094

TBR=mkosiba@chromium.org
Review URL: https://codereview.chromium.org/11098030

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@160965 0039d316-1c4b-4281-b951-d872f2087c98
19 files changed