Run the later parts of startup as UI thread tasks

content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java

Index: content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java
diff --git a/content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java b/content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java
index 9e37370edd02c25b59d3d1bcc49abc211b91f9e2..cd858c26d125dd80252f85d2671e71149f70110b 100644
--- a/content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java
+++ b/content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java
@@ -23,6 +23,7 @@ import org.chromium.content.browser.ContentVideoViewClient;
 import org.chromium.content.browser.ContentView;
 import org.chromium.content.browser.ContentViewClient;
 import org.chromium.content.browser.DeviceUtils;
+import org.chromium.content.browser.StartupObserver;
 import org.chromium.content.browser.TracingIntentHandler;
 import org.chromium.content.common.CommandLine;
 import org.chromium.content.common.ProcessInitException;
@@ -92,26 +93,37 @@ public class ContentShellActivity extends ChromiumActivity {
             if (!TextUtils.isEmpty(startupUrl)) {
                 mShellManager.setStartupUrl(Shell.sanitizeUrl(startupUrl));
             }
-            if (!AndroidBrowserProcess.init(this, AndroidBrowserProcess.MAX_RENDERERS_LIMIT)) {
+
+            if (!AndroidBrowserProcess.init(
+                    this, AndroidBrowserProcess.MAX_RENDERERS_LIMIT, false, new StartupObserver() {
+                        @Override
+                        public void allTasksRun() {
+                            finishInitialization();
+                        }
+                    })) {
                 String shellUrl = ShellManager.DEFAULT_SHELL_URL;
                 if (savedInstanceState != null
                     && savedInstanceState.containsKey(ACTIVE_SHELL_URL_KEY)) {
                     shellUrl = savedInstanceState.getString(ACTIVE_SHELL_URL_KEY);
                 }
                 mShellManager.launchShell(shellUrl);
+                finishInitialization();
             }
-            getActiveContentView().setContentViewClient(new ContentViewClient() {
-                @Override
-                public ContentVideoViewClient getContentVideoViewClient() {
-                    return new ActivityContentVideoViewClient(ContentShellActivity.this);
-                }
-            });
         } catch (ProcessInitException e) {
             Log.e(TAG, "ContentView initialization failed.", e);
             finish();
         }
     }
 
+    private void finishInitialization() {
+        getActiveContentView().setContentViewClient(new ContentViewClient() {
+            @Override
+            public ContentVideoViewClient getContentVideoViewClient() {
+                return new ActivityContentVideoViewClient(ContentShellActivity.this);
+            }
+        });
+    }
+
     @Override
     protected void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);