Remove kInvalidStrictFlag and make gcc-4.5 happy again.

src/parser.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 59 matching lines @@
 class FunctionEntry BASE_EMBEDDED {
  public:
   explicit FunctionEntry(Vector<unsigned> backing) : backing_(backing) { }
   FunctionEntry() : backing_(Vector<unsigned>::empty()) { }
 
   int start_pos() { return backing_[kStartPosOffset]; }
   int end_pos() { return backing_[kEndPosOffset]; }
   int literal_count() { return backing_[kLiteralCountOffset]; }
   int property_count() { return backing_[kPropertyCountOffset]; }
   StrictModeFlag strict_mode_flag() {
+    ASSERT(backing_[kStrictModeOffset] == kStrictMode ||
+           backing_[kStrictModeOffset] == kNonStrictMode);
     return static_cast<StrictModeFlag>(backing_[kStrictModeOffset]);
   }
 
   bool is_valid() { return backing_.length() > 0; }
 
   static const int kSize = 5;
 
  private:
   Vector<unsigned> backing_;
   static const int kStartPosOffset = 0;
@@ skipping 686 matching lines @@
  private:
   static const int kTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_