Speculative Crash fix: Return early if user cancels save dialog.
Speculative Crash fix: Return early if user cancels save dialog.

I'm not able to repro the crash, but this seems safer overall.

BUG=16081
TEST=Right click an image, Save as, Chrome should not crash.

Review URL: http://codereview.chromium.org/149244

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@20132 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