Add a destroy method to the TabModelSelector interface.

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModelSelectorBase.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModelSelectorBase.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModelSelectorBase.java b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModelSelectorBase.java
index 0dfccfe9274aa6dedf40e176e8f3b8b68d26db63..4e1966634cec02c59d110ce608bda9672dbf7c8e 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModelSelectorBase.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModelSelectorBase.java
@@ -207,6 +207,11 @@ public abstract class TabModelSelectorBase implements TabModelSelector {
         return mTabStateInitialized;
     }
 
+    @Override
+    public void destroy() {
+        for (int i = 0; i < getModels().size(); i++) getModelAt(i).destroy();
+    }
+
     /**
      * Notifies all the listeners that the {@link TabModelSelector} or its {@link TabModel} has
      * changed.