Free the native delegate when the user accepts a modal permission dialog.

chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogController.java

Index: chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogController.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogController.java b/chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogController.java
index 589d8b2404ae513fb706895639cbe8526a364b35..d2f5e5a01a55c916d717327bdad0371d874c7b1c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogController.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogController.java
@@ -102,12 +102,14 @@ public class PermissionDialogController implements AndroidPermissionRequester.Re
     @Override
     public void onAndroidPermissionAccepted() {
         mDialogDelegate.onAccept(mSwitchView.isChecked());
+        destroyDelegate();
         scheduleDisplay();
     }
 
     @Override
     public void onAndroidPermissionCanceled() {
         mDialogDelegate.onDismiss();
+        destroyDelegate();
         scheduleDisplay();
     }
 
@@ -126,7 +128,7 @@ public class PermissionDialogController implements AndroidPermissionRequester.Re
         // so act as though the user dismissed it.
         if (activity == null) {
             mDialogDelegate.onDismiss();
-            mDialogDelegate.destroy();
+            destroyDelegate();
             return;
         }
 
@@ -208,7 +210,7 @@ public class PermissionDialogController implements AndroidPermissionRequester.Re
                     } else {
                         mDialogDelegate.onDismiss();
                     }
-                    mDialogDelegate.destroy();
+                    destroyDelegate();
                     scheduleDisplay();
                 }
             }
@@ -243,4 +245,9 @@ public class PermissionDialogController implements AndroidPermissionRequester.Re
 
         return fullString;
     }
+
+    private void destroyDelegate() {
+        mDialogDelegate.destroy();
+        mDialogDelegate = null;
+    }
 }