Fix download cancelling from the save dialog

Fix a bug where a download isn't canceled when the user requests it.

This particular bug only occurs when the user is prompted via save
file dialog and then chooses cancel. In this case, the file selection
code path for canceling was not the same as regular cancel case, so
the network requests continued.

BUG=18160
TEST=When prompted to save a download, choose cancel and notice that
     there is no further network traffic due to that download.


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=22557

[Ben Goodger (Google), 2009-08-05 23:20:25]

OK