Fix asserts and GC unsafeness in stub generation, bug=1689.

src/code-stubs.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 129 matching lines @@
 
   static const char* MajorName(Major major_key, bool allow_unknown_keys);
 
   virtual ~CodeStub() {}
 
   // See comment above, where Instanceof is defined.
   virtual bool CompilingCallsToThisStubIsGCSafe() {
     return MajorKey() <= Instanceof;
   }
 
-
   static void GenerateStubsAheadOfTime();
+  static void GenerateFPStubs();
 
   // Some stubs put untagged junk on the stack that cannot be scanned by the
   // GC.  This means that we must be statically sure that no GC can occur while
   // they are running.  If that is the case they should override this to return
   // true, which will cause an assertion if we try to call something that can
   // GC or if we try to put a stack frame on top of the junk, which would not
   // result in a traversable stack.
   virtual bool SometimesSetsUpAFrame() { return true; }
 
  protected:
@@ skipping 807 matching lines @@
                     bool result);
   void GenerateTypeTransition(MacroAssembler* masm);
 
   Register tos_;
   Types types_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_