[subresource_filter] Site Details UI for default state

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

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/website/Website.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/website/Website.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/website/Website.java
index df376b27c439f6e3489deacfba999d65115f36da..d0a7c4064fe9f0006d59525b7a4b14ff2b2ee7c1 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/preferences/website/Website.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/preferences/website/Website.java
@@ -4,6 +4,7 @@
 
 package org.chromium.chrome.browser.preferences.website;
 
+import org.chromium.chrome.browser.ContentSettingsType;
 import org.chromium.chrome.browser.util.MathUtils;
 
 import java.io.Serializable;
@@ -375,9 +376,15 @@ public class Website implements Serializable {
      * 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);
     }
 
     /**