Faster slow asserts.

Review URL: http://codereview.chromium.org/8267004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9607 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/checks.h

@@ -257,11 +257,8 @@ template <int> class StaticAssertionHelper { };
     SEMI_STATIC_JOIN(__StaticAssertTypedef__, __LINE__)
 
 
-namespace v8 { namespace internal {
+extern bool FLAG_enable_slow_asserts;
 
-bool EnableSlowAsserts();
-
-} }  // namespace v8::internal
 
 // The ASSERT macro is equivalent to CHECK except that it only
 // generates code in debug builds.
@@ -273,7 +270,7 @@ bool EnableSlowAsserts();
 #define ASSERT_GE(v1, v2)    CHECK_GE(v1, v2)
 #define ASSERT_LT(v1, v2)    CHECK_LT(v1, v2)
 #define ASSERT_LE(v1, v2)    CHECK_LE(v1, v2)
-#define SLOW_ASSERT(condition) if (EnableSlowAsserts()) CHECK(condition)
+#define SLOW_ASSERT(condition) if (FLAG_enable_slow_asserts) CHECK(condition)
 #else
 #define ASSERT_RESULT(expr)     (expr)
 #define ASSERT(condition)      ((void) 0)