Remove a warning.

Change-Id: Iffd11a306df9a5140b3406e825185713d17d273e
diff --git a/WebKit/android/jni/WebViewCore.cpp b/WebKit/android/jni/WebViewCore.cpp
index 554a835..2a90f36 100644
--- a/WebKit/android/jni/WebViewCore.cpp
+++ b/WebKit/android/jni/WebViewCore.cpp
@@ -1332,7 +1332,7 @@
             if (label->correspondingControl() == node) {
                 Node* node = label;
                 String result;
-                while (node = node->traverseNextNode(label)) {
+                while ((node = node->traverseNextNode(label))) {
                     if (node->isTextNode()) {
                         Text* textNode = static_cast<Text*>(node);
                         result += textNode->dataImpl();