Remove factory methods from ChromeApplication.

chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java
index e1a78dca9cbde27ed03536075b517b2d14405945..f998065dc3edb7ff2270dd05434804556705f987 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/externalauth/ExternalAuthUtils.java
@@ -17,13 +17,12 @@ import android.text.TextUtils;
 import com.google.android.gms.common.ConnectionResult;
 import com.google.android.gms.common.GoogleApiAvailability;
 
-import org.chromium.base.ContextUtils;
 import org.chromium.base.Log;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.CachedMetrics.SparseHistogramSample;
 import org.chromium.base.metrics.CachedMetrics.TimesHistogramSample;
-import org.chromium.chrome.browser.ChromeApplication;
+import org.chromium.chrome.browser.AppHooks;
 
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
@@ -51,9 +50,7 @@ public class ExternalAuthUtils {
      */
     public static ExternalAuthUtils getInstance() {
         if (sInstance.get() == null) {
-            ChromeApplication application =
-                    (ChromeApplication) ContextUtils.getApplicationContext();
-            sInstance.compareAndSet(null, application.createExternalAuthUtils());
+            sInstance.compareAndSet(null, AppHooks.get().createExternalAuthUtils());
         }
         return sInstance.get();
     }