Remove prototype checks for leaf maps in optimized code.

src/lithium.cc

 // Copyright 2012 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 454 matching lines @@
       }
     }
   }
 #ifdef VERIFY_HEAP
   // This disables verification of weak embedded maps after full GC.
   // AddDependentCode can cause a GC, which would observe the state where
   // this code is not yet in the depended code lists of the embedded maps.
   NoWeakEmbeddedMapsVerificationScope disable_verification_of_embedded_maps;
 #endif
   for (int i = 0; i < maps.length(); i++) {
-    maps.at(i)->AddDependentCode(DependentCodes::kWeaklyEmbeddedGroup, code);
+    maps.at(i)->AddDependentCode(DependentCode::kWeaklyEmbeddedGroup, code);
   }
 }
 
 
 void LChunk::set_allocated_double_registers(BitVector* allocated_registers) {
   allocated_double_registers_ = allocated_registers;
   BitVector* doubles = allocated_double_registers();
   BitVector::Iterator iterator(doubles);
   while (!iterator.Done()) {
     if (info()->saves_caller_doubles()) {
       if (kDoubleSize == kPointerSize * 2) {
         spill_slot_count_ += 2;
       } else {
         spill_slot_count_++;
       }
     }
     iterator.Advance();
   }
 }
 
 
 } }  // namespace v8::internal