customtabs: Allows CustomTabsConnection to be subclassed.

chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
index 7365ae309e5563226e6176bd22cc7bec855edf2e..8096b11442575a5adc876fb0e88fa45a2f2f8a71 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
@@ -40,6 +40,7 @@ import org.chromium.chrome.R;
 import org.chromium.chrome.browser.accessibility.FontSizePrefs;
 import org.chromium.chrome.browser.banners.AppBannerManager;
 import org.chromium.chrome.browser.banners.AppDetailsDelegate;
+import org.chromium.chrome.browser.customtabs.CustomTabsConnection;
 import org.chromium.chrome.browser.document.DocumentActivity;
 import org.chromium.chrome.browser.document.IncognitoDocumentActivity;
 import org.chromium.chrome.browser.download.DownloadManagerService;
@@ -676,6 +677,15 @@ public class ChromeApplication extends ContentApplication {
         if (activity instanceof ChromeActivity) return new ChromeWindow((ChromeActivity) activity);
         return new ActivityWindowAndroid(activity);
     }
+
+    /**
+     * @return An instance of {@link CustomTabsConnection}. Should not be called
+     * outside of {@link CustomTabsConnection#getInstance()}.
+     */
+    public CustomTabsConnection createCustomTabsConnection() {
+        return new CustomTabsConnection(this);
+    }
+
     /**
      * @return Instance of printing controller that is shared among all chromium activities. May
      *         return null if printing is not supported on the platform.