Replace 'class object' with default object in project code

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/kotlin/MemberSignature.kt

@@ -22,7 +22,7 @@ import org.jetbrains.kotlin.name.Name
 // The purpose of this class is to hold a unique signature of either a method or a field, so that annotations on a member can be put
 // into a map indexed by these signatures
 data class MemberSignature private(private val signature: String) {
-    class object {
+    default object {
         platformStatic public fun fromMethodNameAndDesc(nameAndDesc: String): MemberSignature {
             return MemberSignature(nameAndDesc)
         }

core/descriptors/src/org/jetbrains/kotlin/descriptors/annotations/Annotations.kt

@@ -26,7 +26,7 @@ public trait Annotations : Iterable<AnnotationDescriptor> {
 
     public fun findAnnotation(fqName: FqName): AnnotationDescriptor?
 
-    class object {
+    default object {
         public val EMPTY: Annotations = object : Annotations {
             override fun isEmpty() = true
 

core/descriptors/src/org/jetbrains/kotlin/resolve/scopes/JetScope.kt

@@ -76,7 +76,7 @@ public trait JetScope {
         }
     }
 
-    class object {
+    default object {
         public val ALL_NAME_FILTER: (Name) -> Boolean = { true }
     }
 }
@@ -141,7 +141,7 @@ public class DescriptorKindFilter(
         }
     }
 
-    class object {
+    default object {
         public val NON_SINGLETON_CLASSIFIERS_MASK: Int = 0x01
         public val SINGLETON_CLASSIFIERS_MASK: Int = 0x02
         public val PACKAGES_MASK: Int = 0x04

core/descriptors/src/org/jetbrains/kotlin/types/flexibleTypes.kt

@@ -33,7 +33,7 @@ public trait FlexibleTypeCapabilities {
 }
 
 public trait Flexibility : TypeCapability, SubtypingRepresentatives {
-    class object {
+    default object {
         // This is a "magic" classifier: when type resolver sees it in the code, e.g. ft<Foo, Foo?>, instead of creating a normal type,
         // it creates a flexible type, e.g. (Foo..Foo?).
         // This is used in tests and Evaluate Expression to have flexible types in the code,
@@ -145,7 +145,7 @@ public open class DelegatingFlexibleType protected (
         override val upperBound: JetType,
         override val extraCapabilities: FlexibleTypeCapabilities
 ) : DelegatingType(), NullAwareness, Flexibility, FlexibleTypeDelegation, Approximation {
-    class object {
+    default object {
         platformStatic fun create(lowerBound: JetType, upperBound: JetType, extraCapabilities: FlexibleTypeCapabilities): JetType {
             if (lowerBound == upperBound) return lowerBound
             return DelegatingFlexibleType(lowerBound, upperBound, extraCapabilities)