[interpreter] Clarify some names and comments.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index d5fa0d0bc0fabf1bd920e75f93acfaeaff290dc7..8bb1712e33c03ecf52cb8e54f04ad542898de740 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -1314,7 +1314,7 @@ void BytecodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   builder()->JumpIfUndefined(&subject_undefined_label);
   builder()->JumpIfNull(&subject_null_label);
   Register receiver = register_allocator()->NewRegister();
-  builder()->CastAccumulatorToJSObject(receiver);
+  builder()->ConvertAccumulatorToObject(receiver);
 
   register_allocator()->PrepareForConsecutiveAllocations(3);
   Register cache_type = register_allocator()->NextConsecutiveRegister();
@@ -1555,7 +1555,7 @@ void BytecodeGenerator::VisitClassLiteralProperties(ClassLiteral* expr,
     }
 
     VisitForAccumulatorValue(property->key());
-    builder()->CastAccumulatorToName(key);
+    builder()->ConvertAccumulatorToName(key);
     // The static prototype property is read only. We handle the non computed
     // property name case in the parser. Since this is the only case where we
     // need to check for an own read only property we special case this so we do
@@ -1845,7 +1845,7 @@ void BytecodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
 
     builder()->MoveRegister(literal, literal_argument);
     VisitForAccumulatorValue(property->key());
-    builder()->CastAccumulatorToName(key);
+    builder()->ConvertAccumulatorToName(key);
     VisitForAccumulatorValue(property->value());
     builder()->StoreAccumulatorInRegister(value);
     VisitSetHomeObject(value, literal, property);
@@ -2955,7 +2955,7 @@ void BytecodeGenerator::VisitCountOperation(CountOperation* expr) {
     old_value = register_allocator()->outer()->NewRegister();
 
     // Convert old value into a number before saving it.
-    builder()->CastAccumulatorToNumber(old_value);
+    builder()->ConvertAccumulatorToNumber(old_value);
   }
 
   // Perform +1/-1 operation.
@@ -3204,7 +3204,7 @@ void BytecodeGenerator::VisitNewLocalWithContext() {
 
   Register extension_object = register_allocator()->NewRegister();
 
-  builder()->CastAccumulatorToJSObject(extension_object);
+  builder()->ConvertAccumulatorToObject(extension_object);
   VisitFunctionClosureForContext();
   builder()->CreateWithContext(extension_object);
   execution_result()->SetResultInAccumulator();