RelocInfo: fix source position decoding.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 401 matching lines @@
   void AdvanceReadData();
   void AdvanceReadVariableLengthPCJump();
   int GetPositionTypeTag();
   void ReadTaggedData();
 
   static RelocInfo::Mode DebugInfoModeFromTag(int tag);
 
   // If the given mode is wanted, set it in rinfo_ and return true.
   // Else return false. Used for efficiently skipping unwanted modes.
   bool SetMode(RelocInfo::Mode mode) {
-    return (mode_mask_ & 1 << mode) ? (rinfo_.rmode_ = mode, true) : false;
+    return (mode_mask_ & (1 << mode)) ? (rinfo_.rmode_ = mode, true) : false;
   }
 
   byte* pos_;
   byte* end_;
   RelocInfo rinfo_;
   bool done_;
   int mode_mask_;
   DISALLOW_COPY_AND_ASSIGN(RelocIterator);
 };
 
@@ skipping 245 matching lines @@
   unsigned int num_bits_set;
   for (num_bits_set = 0; x; x >>= 1) {
     num_bits_set += x & 1;
   }
   return num_bits_set;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_