Export GetLastCommittedEntryIndex and RemoveEntryAtIndex to Java layer

content/public/android/java/src/org/chromium/content_public/browser/NavigationController.java

Index: content/public/android/java/src/org/chromium/content_public/browser/NavigationController.java
diff --git a/content/public/android/java/src/org/chromium/content_public/browser/NavigationController.java b/content/public/android/java/src/org/chromium/content_public/browser/NavigationController.java
index d9c18690cb9d7a2eb9d74ddf54b2a01b278ffa06..7a22b74768c72bffbb4678ef68e3295a1f1014dc 100644
--- a/content/public/android/java/src/org/chromium/content_public/browser/NavigationController.java
+++ b/content/public/android/java/src/org/chromium/content_public/browser/NavigationController.java
@@ -141,4 +141,15 @@ public interface NavigationController {
      *         exists.
      */
     public NavigationEntry getPendingEntry();
+
+    /**
+     * @return The index of the last committed entry.
+     */
+    public int getLastCommittedEntryIndex();
+
+    /**
+     * Removes the entry at the specified |index|.

[Charlie Reis, 2014/10/29 20:20:55]

Can you also update this to reflect
https://codereview.chromium.org/684173004/diff/1/content/public/browser/navig...

It's important to note that this will clear pending and transient entries if it
succeeds.

[Jaekyun Seok (inactive), 2014/10/30 04:42:34]

Done.

+     * @return false, if the index is the last committed index or the pending entry.
+     */
+    public boolean removeEntryAtIndex(int index);
 }