[Android WebView] Send WebChromeClient.onReceivedTitle when navigating back

android_webview/java/src/org/chromium/android_webview/AwWebContentsDelegate.java

Index: android_webview/java/src/org/chromium/android_webview/AwWebContentsDelegate.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwWebContentsDelegate.java b/android_webview/java/src/org/chromium/android_webview/AwWebContentsDelegate.java
index bf5af89df0bf4cac4e0a693c57b2c680faeef40d..e8c4a5dca09e7a096bfb18eb6b4552d040bc59d9 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwWebContentsDelegate.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwWebContentsDelegate.java
@@ -41,4 +41,9 @@ public abstract class AwWebContentsDelegate extends WebContentsDelegateAndroid {
     @Override
     @CalledByNative
     public abstract void navigationStateChanged(int flags);
+
+    // Not an override, because WebContentsDelegateAndroid maps this call
+    // into onLoad{Started|Stopped}.
+    @CalledByNative
+    public abstract void loadingStateChanged();
 }