Add a new test to HttpNetworkTransaction that tests HTTP Basic Proxy Auth over SPDY. 
Add a new test to HttpNetworkTransaction that tests
HTTP Basic Proxy Auth over SPDY. 

BUG=none
TEST=HttpNetworkTransactionTest.HttpsProxySpdyGetWithProxyAuth

Review URL: http://codereview.chromium.org/4389001

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@65877 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser