Use Activity context for HyperlinkPreference

On the Legal Information settings page, in order for the links to share
the same activity and correctly display the app icon in the recent apps
view, unwrap the context to get the activity context.

Bug: 1001485
Change-Id: I9275b837e1b86c0b90a6a6716be8a4295a357d67
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1807181Reviewed-by: Patrick Noland <pnoland@chromium.org>
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697267}

chrome/android/java/src/org/chromium/chrome/browser/preferences/HyperlinkPreference.java

@@ -17,6 +17,7 @@ import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.customtabs.CustomTabActivity;
 import org.chromium.ui.base.LocalizationUtils;
+import org.chromium.ui.base.WindowAndroid;
 
 /**
  * A preference that navigates to an URL.
@@ -40,7 +41,7 @@ public class HyperlinkPreference extends Preference {
 
     @Override
     protected void onClick() {
-        CustomTabActivity.showInfoPage(getContext(),
+        CustomTabActivity.showInfoPage(WindowAndroid.activityFromContext(getContext()),
                 LocalizationUtils.substituteLocalePlaceholder(getContext().getString(mUrlResId)));
     }