Fix a brace style according to the style guide.

Review URL: https://codereview.chromium.org/188723005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255637 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255637
Move ashmem utility functions to discardable_memory_allocator_android.cc.

These utility functions are now only used in
discardable_memory_allocator_android.cc so they have no reason anymore to live
in discardable_memory_android.cc.

TBR=willchan@chromium.org
BUG=347919

Review URL: https://codereview.chromium.org/189113006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255638 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255638