WebContentsObserver update for PlzNavigate methods

content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsObserverProxy.java

Index: content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsObserverProxy.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsObserverProxy.java b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsObserverProxy.java
index 0134c19986bc752476b0721c907d638e1b5b061c..5703ec0ce6f6a2435d24d0f2e5a07490488a4fcb 100644
--- a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsObserverProxy.java
+++ b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsObserverProxy.java
@@ -9,6 +9,7 @@ import org.chromium.base.ObserverList.RewindableIterator;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.content_public.browser.NavigationHandle;
 import org.chromium.content_public.browser.WebContentsObserver;
 
 /**
@@ -77,10 +78,33 @@ class WebContentsObserverProxy extends WebContentsObserver {
 
     @Override
     @CalledByNative
-    public void didFinishNavigation(
-            boolean isMainFrame, boolean isErrorPage, boolean hasCommitted) {
+    public void didStartNavigation(NavigationHandle navigation) {
         for (mObserversIterator.rewind(); mObserversIterator.hasNext();) {
-            mObserversIterator.next().didFinishNavigation(isMainFrame, isErrorPage, hasCommitted);
+            mObserversIterator.next().didStartNavigation(navigation);
+        }
+    }
+
+    @Override
+    @CalledByNative
+    public void didRedirectNavigation(NavigationHandle navigation) {
+        for (mObserversIterator.rewind(); mObserversIterator.hasNext();) {
+            mObserversIterator.next().didRedirectNavigation(navigation);
+        }
+    }
+
+    @Override
+    @CalledByNative
+    public void readyToCommitNavigation(NavigationHandle navigation) {
+        for (mObserversIterator.rewind(); mObserversIterator.hasNext();) {
+            mObserversIterator.next().readyToCommitNavigation(navigation);
+        }
+    }
+
+    @Override
+    @CalledByNative
+    public void didFinishNavigation(NavigationHandle navigation) {
+        for (mObserversIterator.rewind(); mObserversIterator.hasNext();) {
+            mObserversIterator.next().didFinishNavigation(navigation);
         }
     }