Bug 1792574, part 1 - Move nsAssignmentType to nsStringStream.h. r=xpcom-reviewers,nika

That's the only place it is used.

Differential Revision: https://phabricator.services.mozilla.com/D158211

xpcom/base/nsMemory.h

@@ -101,13 +101,4 @@ class nsMemory {
 #define NS_FREE_XPCOM_ISUPPORTS_POINTER_ARRAY(size, array) \
   NS_FREE_XPCOM_POINTER_ARRAY((size), (array), NS_IF_RELEASE)
 
-/**
- * An enumeration type used to represent a method of assignment.
- */
-enum nsAssignmentType {
-  NS_ASSIGNMENT_COPY,    // copy by value
-  NS_ASSIGNMENT_DEPEND,  // copy by reference
-  NS_ASSIGNMENT_ADOPT    // copy by reference (take ownership of resource)
-};
-
 #endif  // nsMemory_h__

xpcom/io/nsStringStream.h

@@ -28,6 +28,15 @@
     }                                                \
   }
 
+/**
+ * An enumeration type used to represent a method of assignment.
+ */
+enum nsAssignmentType {
+  NS_ASSIGNMENT_COPY,    // copy by value
+  NS_ASSIGNMENT_DEPEND,  // copy by reference
+  NS_ASSIGNMENT_ADOPT    // copy by reference (take ownership of resource)
+};
+
 /**
  * Factory method to get an nsInputStream from a byte buffer.  Result will
  * implement nsIStringInputStream, nsITellableStream and nsISeekableStream.