AK: Make ByteBuffer's trim helper public

Author: https://github.com/implicitfield
Commit: 2de582afc4
Pull-request: https://github.com/SerenityOS/serenity/pull/21954
Reviewed-by: https://github.com/alimpfard

AK/ByteBuffer.h

@@ -168,6 +168,14 @@ public:
         MUST(try_resize(new_size));
     }
 
+    void trim(size_t size, bool may_discard_existing_data)
+    {
+        VERIFY(size <= m_size);
+        if (!m_inline && size <= inline_capacity)
+            shrink_into_inline_buffer(size, may_discard_existing_data);
+        m_size = size;
+    }
+
     ALWAYS_INLINE void ensure_capacity(size_t new_capacity)
     {
         MUST(try_ensure_capacity(new_capacity));
@@ -282,14 +290,6 @@ private:
         other.m_inline = true;
     }
 
-    void trim(size_t size, bool may_discard_existing_data)
-    {
-        VERIFY(size <= m_size);
-        if (!m_inline && size <= inline_capacity)
-            shrink_into_inline_buffer(size, may_discard_existing_data);
-        m_size = size;
-    }
-
     NEVER_INLINE void shrink_into_inline_buffer(size_t size, bool may_discard_existing_data)
     {
         // m_inline_buffer and m_outline_buffer are part of a union, so save the pointer