Fixes after review: ConvertMemberToExtensionIntention.convert moved to companion object

idea/src/org/jetbrains/kotlin/idea/intentions/declarations/ConvertMemberToExtensionIntention.kt

@@ -70,10 +70,6 @@ class ConvertMemberToExtensionIntention : SelfTargetingRangeIntention<KtCallable
         }
     }
 
-    fun convert(element: KtCallableDeclaration): KtCallableDeclaration {
-        return createExtensionCallableAndPrepareBodyToSelect(element).first
-    }
-
     private fun createExtensionCallableAndPrepareBodyToSelect(element: KtCallableDeclaration): Pair<KtCallableDeclaration, KtExpression?> {
         val descriptor = element.resolveToDescriptor()
         val containingClass = descriptor.containingDeclaration as ClassDescriptor
@@ -211,4 +207,10 @@ class ConvertMemberToExtensionIntention : SelfTargetingRangeIntention<KtCallable
         val text = allTypeParameters.map { it.text }.joinToString(",", "<", ">")
         return KtPsiFactory(member).createDeclaration<KtFunction>("fun $text foo()").typeParameterList
     }
+
+    companion object {
+        fun convert(element: KtCallableDeclaration): KtCallableDeclaration {
+            return ConvertMemberToExtensionIntention().createExtensionCallableAndPrepareBodyToSelect(element).first
+        }
+    }
 }

idea/src/org/jetbrains/kotlin/idea/quickfix/migration/MigrateExternalExtensionFix.kt

@@ -75,7 +75,7 @@ class MigrateExternalExtensionFix(declaration: KtNamedDeclaration)
                 convertNativeAnnotationToJsName(memberDeclaration, annotations)
                 annotations.nativeAnnotation.delete()
             } else {
-                val externalDeclaration = ConvertMemberToExtensionIntention().convert(memberDeclaration)
+                val externalDeclaration = ConvertMemberToExtensionIntention.convert(memberDeclaration)
                 fixExtensionMemberDeclaration(externalDeclaration, null)
             }
         }