Change talloc.c to build with the mac 10.7 SDK

talloc.c has a local diff to define strnlen(), instead of using
the definition in replace.c. However, the 10.7 SDK has its own
strnlen(), which makes the compiler complain about a strnlen()
redefinition. Use the pattern from replace.c to fix the
redefinition problem.

With this change, 'browser_tests' builds with the 10.7 SDK.

BUG=136844
TEST=none

Review URL: https://chromiumcodereview.appspot.com/10832045

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148685 0039d316-1c4b-4281-b951-d872f2087c98

third_party/talloc/chromium.patch

@@ -254,7 +254,8 @@ diff -c -r talloc-2.0.1/talloc.c talloc/talloc.c
   }
   
 + #ifndef HAVE_STRNLEN
-+ static size_t strnlen(const char* s, size_t n)
++ #define strnlen rep_strnlen
++ static size_t rep_strnlen(const char* s, size_t n)
 + {
 + 	if (unlikely(!s)) return 0;
 + 	int i = 0;

third_party/talloc/talloc.c

@@ -1594,7 +1594,8 @@ char *talloc_strdup(const void *t, const char *p)
 }
 
 #ifndef HAVE_STRNLEN
-static size_t strnlen(const char* s, size_t n)
+#define strnlen rep_strnlen
+static size_t rep_strnlen(const char* s, size_t n)
 {
 	if (unlikely(!s)) return 0;
 	int i = 0;