Removed a "feature envy" bad smell: Moved AssumeRepresentation method to where

src/hydrogen.cc

Index: src/hydrogen.cc
===================================================================
--- src/hydrogen.cc	(revision 7884)
+++ src/hydrogen.cc	(working copy)
@@ -4636,7 +4636,7 @@
   TypeInfo info = oracle()->UnaryType(expr);
   Representation rep = ToRepresentation(info);
   TraceRepresentation(expr->op(), info, instr, rep);
-  AssumeRepresentation(instr, rep);
+  instr->AssumeRepresentation(rep);
   ast_context()->ReturnInstruction(instr, expr->id());
 }
 
@@ -4707,7 +4707,7 @@
     rep = Representation::Integer32();
   }
   TraceRepresentation(expr->op(), info, instr, rep);
-  AssumeRepresentation(instr, rep);
+  instr->AssumeRepresentation(rep);
   return instr;
 }
 
@@ -4885,7 +4885,7 @@
     rep = Representation::Integer32();
   }
   TraceRepresentation(expr->op(), info, instr, rep);
-  AssumeRepresentation(instr, rep);
+  instr->AssumeRepresentation(rep);
   return instr;
 }
 
@@ -5073,16 +5073,6 @@
 }
 
 
-void HGraphBuilder::AssumeRepresentation(HValue* value, Representation rep) {
-  if (value->CheckFlag(HValue::kFlexibleRepresentation)) {
-    value->ChangeRepresentation(rep);
-    // The representation of the value is dictated by type feedback and
-    // will not be changed later.
-    value->ClearFlag(HValue::kFlexibleRepresentation);
-  }
-}
-
-
 Representation HGraphBuilder::ToRepresentation(TypeInfo info) {
   if (info.IsSmi()) return Representation::Integer32();
   if (info.IsInteger32()) return Representation::Integer32();