CpuProfiler: replace raw position with SourcePosition for DeoptReason

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 8ef2e0a95b3ca19813347b7de738f1a1ae6a1cfe..a6351ec42e496d08f0ff292b1822aed412e0330b 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -39,7 +39,7 @@ struct OffsetRange {
 // script start.
 class SourcePosition {
  public:
-  SourcePosition(const SourcePosition& other) : value_(other.value_) {}
+  explicit SourcePosition(uint32_t value) : value_(value) {}
 
   static SourcePosition Unknown() { return SourcePosition(kNoPosition); }
 
@@ -72,8 +72,6 @@ class SourcePosition {
   // Offset from the start of the inlined function.
   typedef BitField<uint32_t, 9, 23> PositionField;
 
-  explicit SourcePosition(uint32_t value) : value_(value) {}
-
   friend class HPositionInfo;
   friend class LCodeGenBase;