Revert grisu commits.

src/checks.h

Index: src/checks.h
===================================================================
--- src/checks.h	(revision 4091)
+++ src/checks.h	(working copy)
@@ -80,7 +80,6 @@
   }
 }
 
-
 // Helper function used by the CHECK_EQ function when given int64_t
 // arguments.  Should not be called directly.
 static inline void CheckEqualsHelper(const char* file, int line,
@@ -203,27 +202,6 @@
 }
 
 
-static inline void CheckNonEqualsHelper(const char* file,
-                                     int line,
-                                     const char* expected_source,
-                                     double expected,
-                                     const char* value_source,
-                                     double value) {
-  // Force values to 64 bit memory to truncate 80 bit precision on IA32.
-  volatile double* exp = new double[1];
-  *exp = expected;
-  volatile double* val = new double[1];
-  *val = value;
-  if (*exp == *val) {
-    V8_Fatal(file, line,
-             "CHECK_NE(%s, %s) failed\n#   Value: %f",
-             expected_source, value_source, *val);
-  }
-  delete[] exp;
-  delete[] val;
-}
-
-
 namespace v8 {
   class Value;
   template <class T> class Handle;