mac: Fix a memory leak in canvas_skia_mac.

mac: Fix a memory leak in canvas_skia_mac.

Found by the clang static analyzer:
ui/gfx/canvas_skia_mac.mm:70:27: warning: Potential leak of an object allocated on line 70 and stored into 'path'
  CGMutablePathRef path = CGPathCreateMutable();
                          ^
1 warning generated.

BUG=none
TEST=none


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=105751

[Mark Mentovai, 2011-10-16 15:22:11]

LGTM

[commit-bot: I haz the power, 2011-10-16 15:48:04]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/thakis@chromium.org/8308008/1

[commit-bot: I haz the power, 2011-10-16 17:33:10]

The commit queue went berserk retrying too often for a
seemingly flaky test. Builder is win_rel, revision is 105731, job name
was 8308008-1 (retry) (previous was lost) (previous was lost) (previous was
lost).

[commit-bot: I haz the power, 2011-10-16 18:33:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/thakis@chromium.org/8308008/1

[commit-bot: I haz the power, 2011-10-16 23:17:27]

Change committed as 105751