store namespace kind in trace, kill some JavaNamespaceDescriptor usages

JavaNamespaceDescriptor will be killed soon

compiler/frontend/src/org/jetbrains/jet/lang/resolve/BindingContext.java

@@ -173,6 +173,11 @@ public interface BindingContext {
 
     WritableSlice<FqName, ClassDescriptor> FQNAME_TO_CLASS_DESCRIPTOR = new BasicWritableSlice<FqName, ClassDescriptor>(DO_NOTHING, true);
     WritableSlice<FqName, NamespaceDescriptor> FQNAME_TO_NAMESPACE_DESCRIPTOR = new BasicWritableSlice<FqName, NamespaceDescriptor>(DO_NOTHING);
+
+    /**
+     * Each namespace found in src must be registered here.
+     */
+    WritableSlice<NamespaceDescriptor, Boolean> NAMESPACE_IS_SRC = Slices.createSimpleSlice();
     
     WritableSlice<ClassDescriptor, Boolean> INCOMPLETE_HIERARCHY = Slices.createCollectiveSetSlice();
 

compiler/frontend/src/org/jetbrains/jet/lang/resolve/NamespaceFactoryImpl.java

@@ -80,6 +80,7 @@ public class NamespaceFactoryImpl implements NamespaceFactory {
             String namespaceName = JetPsiUtil.safeName(nameExpression.getReferencedName());
 
             NamespaceDescriptorImpl namespaceDescriptor = createNamespaceDescriptorIfNeeded(null, currentOwner, namespaceName, false);
+            trace.record(BindingContext.NAMESPACE_IS_SRC, namespaceDescriptor, true);
 
             currentOwner = namespaceDescriptor;
 
@@ -92,7 +93,10 @@ public class NamespaceFactoryImpl implements NamespaceFactory {
         String name = JetPsiUtil.safeName(namespaceHeader.getName());
         trace.record(RESOLUTION_SCOPE, namespaceHeader, outerScope);
 
-        return createNamespaceDescriptorIfNeeded(file, currentOwner, name, false);
+        NamespaceDescriptorImpl namespaceDescriptor = createNamespaceDescriptorIfNeeded(file, currentOwner, name, false);
+        trace.record(BindingContext.NAMESPACE_IS_SRC, namespaceDescriptor, true);
+
+        return namespaceDescriptor;
     }
 
     @Override