Disable leak annotations for NaCl untrusted builds.

BUG=116317
TEST=compiles on linux heap checker bots
Review URL: https://chromiumcodereview.appspot.com/10824356

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152137 0039d316-1c4b-4281-b951-d872f2087c98

base/debug/leak_annotations.h

@@ -7,7 +7,8 @@
 
 #include "build/build_config.h"
 
-#if defined(OS_POSIX) && !defined(OS_MACOSX) && defined(USE_HEAPCHECKER)
+#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_NACL) && \
+    defined(USE_HEAPCHECKER)
 
 #include "third_party/tcmalloc/chromium/src/gperftools/heap-checker.h"