[subresource_filter] Site Details UI for default state

chrome/android/java/src/org/chromium/chrome/browser/preferences/website/Website.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.preferences.website;
 
+import org.chromium.chrome.browser.ContentSettingsType;
 import org.chromium.chrome.browser.util.MathUtils;
 
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
 /**
  * Website is a class for storing information about a website and its associated permissions.
  */
 public class Website implements Serializable {
@@ skipping 351 matching lines @@
         if (mSubresourceFilterException != null) {
             return mSubresourceFilterException.getContentSetting();
         }
         return null;
     }
 
     /**
      * Sets the Subresource Filter permission.
      */
     public void setSubresourceFilterPermission(ContentSetting value) {
-        if (mSubresourceFilterException != null) {
-            mSubresourceFilterException.setContentSetting(value);
+        // It is possible to set the permission without having an existing exception, because we can
+        // show the BLOCK state even when this permission is set to the default. In that case, just
+        // set an exception now to BLOCK to enable changing the permission.
+        if (mSubresourceFilterException == null) {
+            setSubresourceFilterException(new ContentSettingException(
+                    ContentSettingsType.CONTENT_SETTINGS_TYPE_SUBRESOURCE_FILTER,
+                    getAddress().getOrigin(), ContentSetting.BLOCK, ""));
         }
+        mSubresourceFilterException.setContentSetting(value);
     }
 
     /**
      * Sets protected media identifier access permission information class.
      */
     public void setProtectedMediaIdentifierInfo(ProtectedMediaIdentifierInfo info) {
         mProtectedMediaIdentifierInfo = info;
     }
 
     public ProtectedMediaIdentifierInfo getProtectedMediaIdentifierInfo() {
@@ skipping 79 matching lines @@
         mUsbInfo.add(info);
     }
 
     /**
      * Returns the set of USB devices this website has been granted permission to access.
      */
     public List<UsbInfo> getUsbInfo() {
         return new ArrayList<UsbInfo>(mUsbInfo);
     }
 }