PlzNavigate: Chrome UI changes for new methods of WebContentsObserver

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

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/EmptyTabObserver.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/EmptyTabObserver.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/EmptyTabObserver.java
index e35128cf3cd436e0990a3395e68b1dc44f83d9ea..b007279bbb935be5f4926c028274e2af2e513570 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/EmptyTabObserver.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/EmptyTabObserver.java
@@ -82,29 +82,18 @@ public class EmptyTabObserver implements TabObserver {
     public void onToggleFullscreenMode(Tab tab, boolean enable) { }
 
     @Override
-    public void onDidFailLoad(Tab tab, boolean isProvisionalLoad, boolean isMainFrame,
-            int errorCode, String description, String failingUrl) { }
-
-    @Override
-    public void onDidStartProvisionalLoadForFrame(
-            Tab tab, boolean isMainFrame, String validatedUrl) {}
-
-    @Override
-    public void onDidCommitProvisionalLoadForFrame(Tab tab, long frameId, boolean isMainFrame,
-            String url, int transitionType) { }
-
-    @Override
-    public void onDidNavigateMainFrame(Tab tab, String url, String baseUrl,
-            boolean isNavigationToDifferentPage, boolean isFragmentNavigation, int statusCode) { }
+    public void onDidFailLoad(
+            Tab tab, boolean isMainFrame, int errorCode, String description, String failingUrl) {}
 
     @Override
     public void onDidStartNavigation(
-            Tab tab, String url, boolean isInMainFrame, boolean isErrorPage) {}
+            Tab tab, String url, boolean isInMainFrame, boolean isSamePage, boolean isErrorPage) {}
 
     @Override
     public void onDidFinishNavigation(Tab tab, String url, boolean isInMainFrame,
-            boolean isErrorPage, boolean hasCommitted, boolean isSamePage, Integer pageTransition,
-            int errorCode) {}
+            boolean isErrorPage, boolean hasCommitted, boolean isSamePage,
+            boolean isFragmentNavigation, Integer pageTransition, int errorCode,
+            int httpStatusCode) {}
 
     @Override
     public void didFirstVisuallyNonEmptyPaint(Tab tab) {}
@@ -119,9 +108,6 @@ public class EmptyTabObserver implements TabObserver {
     public void onDidDetachInterstitialPage(Tab tab) { }
 
     @Override
-    public void onDidStartNavigationToPendingEntry(Tab tab, String url) { }
-
-    @Override
     public void onBackgroundColorChanged(Tab tab, int color) { }
 
     @Override