Move object literal checking into checker classes

src/compiler/ast-graph-builder.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/ast-graph-builder.h"
 
 #include "src/compiler.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/control-builders.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 1063 matching lines @@
               javascript()->CallRuntime(Runtime::kSetProperty, 4);
           NewNode(op, receiver, key, value, strict);
         }
         break;
       }
       case ObjectLiteral::Property::PROTOTYPE: {
         environment()->Push(literal);  // Duplicate receiver.
         VisitForValue(property->value());
         Node* value = environment()->Pop();
         Node* receiver = environment()->Pop();
-        if (property->emit_store()) {
-          const Operator* op =
-              javascript()->CallRuntime(Runtime::kInternalSetPrototype, 2);
-          Node* set_prototype = NewNode(op, receiver, value);
-          // SetPrototype should not lazy deopt on an object literal.
-          PrepareFrameState(set_prototype, BailoutId::None());
-        }
+        DCHECK(property->emit_store());
+        const Operator* op =
+            javascript()->CallRuntime(Runtime::kInternalSetPrototype, 2);
+        Node* set_prototype = NewNode(op, receiver, value);
+        // SetPrototype should not lazy deopt on an object literal.
+        PrepareFrameState(set_prototype, BailoutId::None());
         break;
       }
       case ObjectLiteral::Property::GETTER:
         accessor_table.lookup(key)->second->getter = property->value();
         break;
       case ObjectLiteral::Property::SETTER:
         accessor_table.lookup(key)->second->setter = property->value();
         break;
     }
   }
@@ skipping 1333 matching lines @@
 
 BitVector* AstGraphBuilder::GetVariablesAssignedInLoop(
     IterationStatement* stmt) {
   if (loop_assignment_analysis_ == NULL) return NULL;
   return loop_assignment_analysis_->GetVariablesAssignedInLoop(stmt);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8