Remove some unused and unneeded flags.

src/spaces.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 434 matching lines @@
   void SetFlags(intptr_t flags, intptr_t mask) {
     flags_ = (flags_ & ~mask) | (flags & mask);
   }
 
   // Return all current flags.
   intptr_t GetFlags() { return flags_; }
 
   // Manage live byte count (count of bytes known to be live,
   // because they are marked black).
   void ResetLiveBytes() {
-    if (FLAG_trace_live_byte_count) {
+    if (FLAG_gc_verbose) {
       PrintF("ResetLiveBytes:%p:%x->0\n",
              static_cast<void*>(this), live_byte_count_);
     }
     live_byte_count_ = 0;
   }
   void IncrementLiveBytes(int by) {
     ASSERT_LE(static_cast<unsigned>(live_byte_count_), size_);
-    if (FLAG_trace_live_byte_count) {
+    if (FLAG_gc_verbose) {
       printf("UpdateLiveBytes:%p:%x%c=%x->%x\n",
              static_cast<void*>(this), live_byte_count_,
              ((by < 0) ? '-' : '+'), ((by < 0) ? -by : by),
              live_byte_count_ + by);
     }
     live_byte_count_ += by;
     ASSERT_LE(static_cast<unsigned>(live_byte_count_), size_);
   }
   int LiveBytes() {
     ASSERT(static_cast<unsigned>(live_byte_count_) <= size_);
@@ skipping 2145 matching lines @@
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_H_