Avoid extension functions in Java-facing code in project

This is to workaround the coming functions / extension functions global
refactoring and move

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -24,7 +24,6 @@ import com.intellij.psi.tree.IElementType;
 import com.intellij.util.ArrayUtil;
 import com.intellij.util.Function;
 import com.intellij.util.containers.Stack;
-import kotlin.ExtensionFunction0;
 import kotlin.Function1;
 import kotlin.KotlinPackage;
 import kotlin.Unit;
@@ -1584,14 +1583,14 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> implem
             addLeaveTaskToRemoveDescriptorFromFrameMap(statement, blockEnd, leaveTasks);
         }
 
-        return new StackValueWithLeaveTask(answer, new ExtensionFunction0<StackValueWithLeaveTask, Unit>() {
+        return new StackValueWithLeaveTask(answer, new Function1<StackValue, Unit>() {
             @Override
-            public Unit invoke(StackValueWithLeaveTask wrapper) {
+            public Unit invoke(StackValue value) {
                 if (labelBlockEnd == null) {
                     v.mark(blockEnd);
                 }
                 for (Function<StackValue, Void> task : Lists.reverse(leaveTasks)) {
-                    task.fun(wrapper.getStackValue());
+                    task.fun(value);
                 }
                 return Unit.INSTANCE$;
             }

compiler/backend/src/org/jetbrains/kotlin/codegen/StackValue.kt

@@ -18,7 +18,6 @@ package org.jetbrains.kotlin.codegen
 
 import org.jetbrains.org.objectweb.asm.Type
 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
-import org.jetbrains.org.objectweb.asm.Label
 
 class CoercionValue(
         val value: StackValue,
@@ -47,7 +46,7 @@ class CoercionValue(
 
 public class StackValueWithLeaveTask(
         val stackValue: StackValue,
-        val leaveTasks: StackValueWithLeaveTask.() -> Unit
+        val leaveTasks: (StackValue) -> Unit
 ) : StackValue(stackValue.type) {
 
     override fun putReceiver(v: InstructionAdapter, isRead: Boolean) {
@@ -56,7 +55,7 @@ public class StackValueWithLeaveTask(
 
     override fun putSelector(type: Type, v: InstructionAdapter) {
         stackValue.putSelector(type, v)
-        leaveTasks()
+        leaveTasks(stackValue)
     }
 }