aw: Skip onPageStarted for in-page navigation

This matches old behavior. Note that fragment navigation is strict
subset of in-page navigations. in-page navigations also include
history.replaceState and history.pushState

Bug: 902722, 896022
Change-Id: I002fab4982620e7e13b84a7d96547e105c7338bb
Reviewed-on: https://chromium-review.googlesource.com/c/1345229Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Shimi Zhang <ctzsm@chromium.org>
Commit-Queue: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609856}

android_webview/java/src/org/chromium/android_webview/AwWebContentsObserver.java

@@ -105,9 +105,10 @@ public class AwWebContentsObserver extends WebContentsObserver {
 
         AwContentsClient client = mAwContentsClient.get();
         if (client != null) {
-            // OnPageStarted is not called for fragment navigations.
+            // OnPageStarted is not called for in-page navigations, which include fragment
+            // navigations and navigation from history.push/replaceState.
             // Error page is handled by AwContentsClientBridge.onReceivedError.
-            if (!isFragmentNavigation && !isErrorPage
+            if (!isSameDocument && !isErrorPage
                     && AwFeatureList.pageStartedOnCommitEnabled(isRendererInitiated)) {
                 client.getCallbackHelper().postOnPageStarted(url);
             }