Coverity: Initialize pending_buf_size_ in the constructor.
Coverity: Initialize pending_buf_size_ in the constructor.

CID=1639
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/218011

git-svn-id: http://src.chromium.org/svn/trunk/src@27108 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: c49416c5b8e4fdd69b637049c3f19bdc2effd180
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