Hook up new distillability with Clank UI

chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/ReaderModeTabInfo.java

Index: chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/ReaderModeTabInfo.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/ReaderModeTabInfo.java b/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/ReaderModeTabInfo.java
index cc389ecd0a6ee08c3ba0e6f437d670acd2559fe9..050caa42f79f867e2c632d409fb19ec2a04ab387 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/ReaderModeTabInfo.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/ReaderModeTabInfo.java
@@ -23,6 +23,10 @@ public class ReaderModeTabInfo {
     // back from distiller and the user has already loaded a new URL.
     private String mCurrentUrl;
 
+    // The distillability heuristics now use a callback to notify the manager that a page can
+    // be distilled. This flag is used to detect if the callback is set for this tab.
+    private boolean mIsCallbackSet;
+
     /**
      * @param observer The WebContentsObserver for the tab this object represents.
      */
@@ -78,5 +82,19 @@ public class ReaderModeTabInfo {
     public String getUrl() {
         return mCurrentUrl;
     }
+
+    /**
+     * @return If the distillability callback is set for this object's tab.
+     */
+    public boolean isCallbackSet() {
+        return mIsCallbackSet;
+    }
+
+    /**
+     * @param isSet Set if this object's tab has a distillability callback.
+     */
+    public void setIsCallbackSet(boolean isSet) {
+        mIsCallbackSet = isSet;
+    }
 }