Refactor WebApkServiceConnectionManager.

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java

Index: chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java
diff --git a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java
index 630a7d01467fea5f084ee057d9897bff311d2bb3..1c046b3f607b81be683c16641c7505241aea250c 100644
--- a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java
+++ b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java
@@ -14,6 +14,7 @@ import android.content.pm.ResolveInfo;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.StrictMode;
 import android.text.TextUtils;
 import android.util.TypedValue;
 import android.view.View;
@@ -190,9 +191,14 @@ public class WebApkUtils {
 
     /** Returns the package name of the host browser cached in the SharedPreferences. */
     public static String getHostBrowserFromSharedPreference(Context context) {
-        SharedPreferences sharedPref =
-                context.getSharedPreferences(WebApkConstants.PREF_PACKAGE, Context.MODE_PRIVATE);
-        return sharedPref.getString(SHARED_PREF_RUNTIME_HOST, null);
+        StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskWrites();
+        try {
+            SharedPreferences sharedPref = context.getSharedPreferences(
+                    WebApkConstants.PREF_PACKAGE, Context.MODE_PRIVATE);
+            return sharedPref.getString(SHARED_PREF_RUNTIME_HOST, null);
+        } finally {
+            StrictMode.setThreadPolicy(oldPolicy);
+        }
     }
 
     /** Returns a set of package names of all the installed browsers on the device. */