Adding CrHome-specific implementation for home page tile.

chrome/android/java/src/org/chromium/chrome/browser/suggestions/MostVisitedSites.java

Index: chrome/android/java/src/org/chromium/chrome/browser/suggestions/MostVisitedSites.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/MostVisitedSites.java b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/MostVisitedSites.java
index 9c981b232b4b57cc4f978483d64bf3f2510ba5bb..1597af0f1987b4180ee18be779c3753cbfc0856e 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/MostVisitedSites.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/MostVisitedSites.java
@@ -6,6 +6,8 @@ package org.chromium.chrome.browser.suggestions;
 
 import org.chromium.base.annotations.CalledByNative;
 
+import javax.annotation.Nullable;
+
 /**
  * Methods to provide most recent urls, titles and thumbnails.
  */
@@ -41,6 +43,30 @@ interface MostVisitedSites {
     }
 
     /**
+     * An interface to provide {@link MostVisitedSites} with platform-specific home page data.
+     */
+    interface HomePageClient {
+        /**
+         * @return True if a home page is active and set.
+         */
+        @CalledByNative("HomePageClient")
+        boolean isHomePageEnabled();
+
+        /**
+         * @return True if the new tab page was set as home page.
+         */
+        @CalledByNative("HomePageClient")
+        boolean isNewTabPageUsedAsHomePage();
+
+        /**
+         * @return The raw URL of the currently set home page.
+         */
+        @CalledByNative("HomePageClient")
+        @Nullable
+        String getHomePageUrl();
+    }
+
+    /**
      * This instance must not be used after calling destroy().
      */
     void destroy();