 Unprotect the allocator before trying to create a minidump from a signal.
 Unprotect the allocator before trying to create a minidump from a signal.

 It is impossible to write a minidump with memory protected. This means that
before this change, no minidump were created when a signal was caught, instead
the application froze.
Review URL: https://breakpad.appspot.com/389002

git-svn-id: 7939527bf0a06ad24ad020f729d5600cb42ed5d7@964 4c0a9323-5329-0410-9bdc-e9ce6186880e

bittorrent/breakpad,bittorrent/breakpad,bittorrent/breakpad,bittorrent/breakpad,wesen/google-breakpad,bittorrent/breakpad,bittorrent/breakpad,bittorrent/breakpad,wesen/google-breakpad,wesen/google-breakpad,wesen/google-breakpad,wesen/google-breakpad,wesen/google-breakpad