Hide modal permission prompts on Android upon tab navigation/destruction

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

Index: chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogDelegate.java
index 3397d3f3e8ec7f691bb4709c76fccfffcd42516a..79b08a5fe57baf1ff288e0828d755ba96e93ef72 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogDelegate.java
@@ -21,6 +21,9 @@ public class PermissionDialogDelegate {
     /** The native-side counterpart of this class */
     private long mNativeDelegatePtr;
 
+    /** The controller for this class */
+    private PermissionDialogController mDialogController;
+
     /** The tab for which to create the dialog. */
     private Tab mTab;
 
@@ -103,6 +106,21 @@ public class PermissionDialogDelegate {
         nativeLinkClicked(mNativeDelegatePtr);
     }
 
+    public void setDialogController(PermissionDialogController controller) {
+        assert mDialogController == null;

[dominickn, 2017/05/24 03:33:38]

I don't think this assert is needed.

[Timothy Loh, 2017/05/24 04:59:33]

OK, removed

+        mDialogController = controller;
+    }
+
+    /**
+     * Called from C++ by |nativeDelegatePtr| to destroy the dialog.
+     */
+    @CalledByNative
+    private void destroyFromNative() {

[dominickn, 2017/05/24 03:33:38]

dismissFromNative

[Timothy Loh, 2017/05/24 04:59:33]

Done.

+        assert mNativeDelegatePtr != 0;
+        mNativeDelegatePtr = 0;
+        mDialogController.destroyFromNative(this);
+    }
+
     /**
      * Called from C++ by |nativeDelegatePtr| to instantiate this class.
      *