Guard against NULL webview in dispatchDidFinishDocumentLoad. The webview can be NULL if dispatchDidFinishDocumentLoad is called via a frame destructor.
Guard against NULL webview in dispatchDidFinishDocumentLoad. The
webview can be NULL if dispatchDidFinishDocumentLoad is called via a
frame destructor.

BUG=20324
TEST=LayoutTests/http/tests/security/javascriptURL/javascriptURL-in-new-iframe.html
Review URL: http://codereview.chromium.org/194022

git-svn-id: http://src.chromium.org/svn/trunk/src@25596 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d47a03d1e6c6694742263d74a614a7114ce5e5d5
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser