Remove some asserts to speed up debug mode.

src/mark-compact.h

Index: src/mark-compact.h
===================================================================
--- src/mark-compact.h	(revision 9581)
+++ src/mark-compact.h	(working copy)
@@ -61,68 +61,52 @@
   // Impossible markbits: 01
   static const char* kImpossibleBitPattern;
   static inline bool IsImpossible(MarkBit mark_bit) {
-    ASSERT(strcmp(kImpossibleBitPattern, "01") == 0);
     return !mark_bit.Get() && mark_bit.Next().Get();
   }
 
   // Black markbits: 10 - this is required by the sweeper.
   static const char* kBlackBitPattern;
   static inline bool IsBlack(MarkBit mark_bit) {
-    ASSERT(strcmp(kBlackBitPattern, "10") == 0);
-    ASSERT(!IsImpossible(mark_bit));
     return mark_bit.Get() && !mark_bit.Next().Get();
   }
 
   // White markbits: 00 - this is required by the mark bit clearer.
   static const char* kWhiteBitPattern;
   static inline bool IsWhite(MarkBit mark_bit) {
-    ASSERT(strcmp(kWhiteBitPattern, "00") == 0);
-    ASSERT(!IsImpossible(mark_bit));
     return !mark_bit.Get();
   }
 
   // Grey markbits: 11
   static const char* kGreyBitPattern;
   static inline bool IsGrey(MarkBit mark_bit) {
-    ASSERT(strcmp(kGreyBitPattern, "11") == 0);
-    ASSERT(!IsImpossible(mark_bit));
     return mark_bit.Get() && mark_bit.Next().Get();
   }
 
   static inline void MarkBlack(MarkBit mark_bit) {
     mark_bit.Set();
     mark_bit.Next().Clear();
-    ASSERT(Marking::IsBlack(mark_bit));
   }
 
   static inline void BlackToGrey(MarkBit markbit) {
-    ASSERT(IsBlack(markbit));
     markbit.Next().Set();
-    ASSERT(IsGrey(markbit));
   }
 
   static inline void WhiteToGrey(MarkBit markbit) {
-    ASSERT(IsWhite(markbit));
     markbit.Set();
     markbit.Next().Set();
-    ASSERT(IsGrey(markbit));
   }
 
   static inline void GreyToBlack(MarkBit markbit) {
-    ASSERT(IsGrey(markbit));
     markbit.Next().Clear();
-    ASSERT(IsBlack(markbit));
   }
 
   static inline void BlackToGrey(HeapObject* obj) {
-    ASSERT(obj->Size() >= 2 * kPointerSize);
     BlackToGrey(MarkBitFrom(obj));
   }
 
   static inline void AnyToGrey(MarkBit markbit) {
     markbit.Set();
     markbit.Next().Set();
-    ASSERT(IsGrey(markbit));
   }
 
   // Returns true if the the object whose mark is transferred is marked black.
@@ -173,8 +157,6 @@
       to_mark_bit.Next().Set();
       is_black = false;  // Was actually gray.
     }
-    ASSERT(Color(from) == Color(to));
-    ASSERT(is_black == (Color(to) == BLACK_OBJECT));
     return is_black;
   }
 
@@ -227,7 +209,6 @@
   inline void PushGrey(HeapObject* object) {
     ASSERT(object->IsHeapObject());
     if (IsFull()) {
-      ASSERT(Marking::IsGrey(Marking::MarkBitFrom(object)));
       SetOverflowed();
     } else {
       array_[top_] = object;
@@ -246,7 +227,6 @@
   inline void UnshiftGrey(HeapObject* object) {
     ASSERT(object->IsHeapObject());
     if (IsFull()) {
-      ASSERT(Marking::IsGrey(Marking::MarkBitFrom(object)));
       SetOverflowed();
     } else {
       bottom_ = ((bottom_ - 1) & mask_);