Add Early DNS prefetching to ChromeShell.

chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java

Index: chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java
diff --git a/chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java b/chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java
index d167e5d1db950c98d17fae60d609f6372246974d..dc4be6e6b5449c87bdf33b77e5dfa58bdf95b119 100644
--- a/chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java
+++ b/chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java
@@ -32,6 +32,7 @@ import org.chromium.base.library_loader.ProcessInitException;
 import org.chromium.chrome.browser.DevToolsServer;
 import org.chromium.chrome.browser.FileProviderHelper;
 import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.WarmupManager;
 import org.chromium.chrome.browser.WebsiteSettingsPopup;
 import org.chromium.chrome.browser.appmenu.AppMenuHandler;
 import org.chromium.chrome.browser.appmenu.AppMenuPropertiesDelegate;
@@ -125,6 +126,11 @@ public class ChromeShellActivity extends ActionBarActivity implements AppMenuPro
 
         DeviceUtils.addDeviceSpecificUserAgentSwitch(this);
 
+        String url = getUrlFromIntent(getIntent());
+        if (url != null) {
+            WarmupManager.getInstance().maybePrefetchDnsForUrlInBackground(this, url);
+        }
+
         BrowserStartupController.StartupCallback callback =
                 new BrowserStartupController.StartupCallback() {
                     @Override