[Android Refactor] Remove unused methods in WebappActivity

Removes unused:
WebappActivity#loadUrlIfPostShareTarget()
WebappActivity#createTabDelegateFactory()

BUG=None

Change-Id: Ifa7294b87fc2815eebdba7adbd25cc1fe56b00bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2148538Reviewed-by: Glenn Hartmann <hartmanng@chromium.org>
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#759934}

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappActivity.java

@@ -42,7 +42,6 @@ import org.chromium.chrome.browser.dependency_injection.ChromeActivityCommonsMod
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tab.TabBrowserControlsConstraintsHelper;
-import org.chromium.chrome.browser.tab.TabDelegateFactory;
 import org.chromium.chrome.browser.ui.appmenu.AppMenuPropertiesDelegate;
 import org.chromium.chrome.browser.usage_stats.UsageStatsService;
 import org.chromium.chrome.browser.util.AndroidTaskUtils;
@@ -150,10 +149,6 @@ public class WebappActivity extends BaseCustomTabActivity<WebappActivityComponen
         }
     }
 
-    protected boolean loadUrlIfPostShareTarget(WebappInfo webappInfo) {
-        return false;
-    }
-
     protected WebappInfo createWebappInfo(Intent intent) {
         if (intent == null) return WebappInfo.createEmpty();
 
@@ -494,13 +489,6 @@ public class WebappActivity extends BaseCustomTabActivity<WebappActivityComponen
         return null;
     }
 
-    /**
-     * @return {@link TabDelegateFactory} to be used while creating the associated {@link Tab}.
-     */
-    private TabDelegateFactory createTabDelegateFactory() {
-        return mDelegateFactory;
-    }
-
     // We're temporarily disable CS on webapp since there are some issues. (http://crbug.com/471950)
     // TODO(changwan): re-enable it once the issues are resolved.
     @Override