Accept PWS results without a results key

chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClient.java

Index: chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClient.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClient.java b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClient.java
index 7fff8c24bba8d8ac6770955a0faa525404bdb565..4bd563742c32e30e3c54fd2a923e15b64be66754 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClient.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClient.java
@@ -78,11 +78,9 @@ class PwsClient {
     private static Collection<PwsResult> parseResolveScanResponse(JSONObject result) {
         // Get the metadata array.
         Collection<PwsResult> pwsResults = new ArrayList<>();
-        JSONArray metadata;
-        try {
-            metadata = result.getJSONArray("results");
-        } catch (JSONException e) {
-            Log.e(TAG, "PWS returned invalid data", e);
+        JSONArray metadata = result.optJSONArray("results");
+        if (metadata == null) {
+            // There are no valid results.
             return pwsResults;
         }