Skip TabObserver#onUrlUpdated when not in main frame

chrome/android/java/src/org/chromium/chrome/browser/tab/TabWebContentsObserver.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/TabWebContentsObserver.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/TabWebContentsObserver.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/TabWebContentsObserver.java
index efea41c3cb5074b1c206324391183cca08fba665..10dc0175b0b8ea7701a2eb622d34ecf873e61a0a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/TabWebContentsObserver.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/TabWebContentsObserver.java
@@ -231,11 +231,11 @@ public class TabWebContentsObserver extends WebContentsObserver {
             mTab.updateTitle();
             mTab.handleDidFinishNavigation(url, pageTransition);
             mTab.setIsShowingErrorPage(isErrorPage);
-        }
 
-        observers.rewind();
-        while (observers.hasNext()) {
-            observers.next().onUrlUpdated(mTab);
+            observers.rewind();
+            while (observers.hasNext()) {
+                observers.next().onUrlUpdated(mTab);
+            }
         }
 
         FullscreenManager fullscreenManager = mTab.getFullscreenManager();