Separate deferred startup into tasks.

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

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser;
 
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ skipping 257 matching lines @@
         cacheNativeFlags();
     }
 
     /**
      * Called when a top-level Chrome activity (ChromeTabbedActivity, FullscreenActivity) is
      * started in foreground. It will not be called again when other Chrome activities take over
      * (see onStart()), that is, when correct activity calls startActivity() for another Chrome
      * activity.
      */
     private void onForegroundSessionStart() {
+        UmaUtils.recordForegroundStartTime();
         ChildProcessLauncher.onBroughtToForeground();
         mBackgroundProcessing.startTimers();
         updatePasswordEchoState();
         FontSizePrefs.getInstance(this).onSystemFontScaleChanged();
         updateAcceptLanguages();
         mVariationsSession.start(getApplicationContext());
         mPowerBroadcastReceiver.onForegroundSessionStart();
 
         // Track the ratio of Chrome startups that are caused by notification clicks.
         // TODO(johnme): Add other reasons (and switch to recordEnumeratedHistogram).
@@ skipping 152 matching lines @@
     }
 
     /**
      * The host activity should call this after the native library has loaded to ensure classes
      * shared by Activities in the same process are properly initialized.
      */
     public void initializeSharedClasses() {
         if (mInitializedSharedClasses) return;
         mInitializedSharedClasses = true;
 
-        ForcedSigninProcessor.start(this);
-        AccountsChangedReceiver.addObserver(new AccountsChangedReceiver.AccountsChangedObserver() {
+        DeferredStartupHandler.getInstance().addDeferredTask(new Runnable() {
             @Override
-            public void onAccountsChanged(Context context, Intent intent) {
-                ThreadUtils.runOnUiThread(new Runnable() {
-                    @Override
-                    public void run() {
-                        ForcedSigninProcessor.start(ChromeApplication.this);
-                    }
-                });
+            public void run() {
+                ForcedSigninProcessor.start(getApplicationContext());
+                AccountsChangedReceiver.addObserver(
+                        new AccountsChangedReceiver.AccountsChangedObserver() {
+                            @Override
+                            public void onAccountsChanged(Context context, Intent intent) {
+                                ThreadUtils.runOnUiThread(new Runnable() {
+                                    @Override
+                                    public void run() {
+                                        ForcedSigninProcessor.start(getApplicationContext());
+                                    }
+                                });
+                            }
+                        });
             }
         });
-        GoogleServicesManager.get(this).onMainActivityStart();
-        RevenueStats.getInstance();
 
-        mDevToolsServer = new DevToolsServer(DEV_TOOLS_SERVER_SOCKET_PREFIX);
-        mDevToolsServer.setRemoteDebuggingEnabled(
-                true, DevToolsServer.Security.ALLOW_DEBUG_PERMISSION);
+        DeferredStartupHandler.getInstance().addDeferredTask(new Runnable() {
+            @Override
+            public void run() {
+                GoogleServicesManager.get(getApplicationContext()).onMainActivityStart();
+                RevenueStats.getInstance();
+            }
+        });
 
-        startApplicationActivityTracker();
+        DeferredStartupHandler.getInstance().addDeferredTask(new Runnable() {
+            @Override
+            public void run() {
+                mDevToolsServer = new DevToolsServer(DEV_TOOLS_SERVER_SOCKET_PREFIX);
+                mDevToolsServer.setRemoteDebuggingEnabled(
+                        true, DevToolsServer.Security.ALLOW_DEBUG_PERMISSION);
 
-        // Add process check to diagnose http://crbug.com/606309. Remove this after the bug is
-        // fixed.
-        assert !CommandLine.getInstance().hasSwitch(ContentSwitches.SWITCH_PROCESS_TYPE);
-        if (!CommandLine.getInstance().hasSwitch(ContentSwitches.SWITCH_PROCESS_TYPE)) {
-            DownloadController.setDownloadNotificationService(
-                    DownloadManagerService.getDownloadManagerService(this));
-        }
+                startApplicationActivityTracker();
+            }
+        });
 
-        if (ApiCompatibilityUtils.isPrintingSupported()) {
-            mPrintingController = PrintingControllerFactory.create(getApplicationContext());
-        }
+        DeferredStartupHandler.getInstance().addDeferredTask(new Runnable() {
+            @Override
+            public void run() {
+                // Add process check to diagnose http://crbug.com/606309. Remove this after the bug
+                // is fixed.
+                assert !CommandLine.getInstance().hasSwitch(ContentSwitches.SWITCH_PROCESS_TYPE);
+                if (!CommandLine.getInstance().hasSwitch(ContentSwitches.SWITCH_PROCESS_TYPE)) {
+                    DownloadController.setDownloadNotificationService(
+                            DownloadManagerService.getDownloadManagerService(
+                                    getApplicationContext()));
+                }
+
+                if (ApiCompatibilityUtils.isPrintingSupported()) {
+                    mPrintingController = PrintingControllerFactory.create(getApplicationContext());
+                }
+            }
+        });
     }
 
     /**
      * For extending classes to carry out tasks that initialize the browser process.
      * Should be called almost immediately after the native library has loaded to initialize things
      * that really, really have to be set up early.  Avoid putting any long tasks here.
      */
     public void initializeProcess() {
         if (mIsProcessInitialized) return;
         mIsProcessInitialized = true;
@@ skipping 370 matching lines @@
      * Caches flags that are needed by Activities that launch before the native library is loaded
      * and stores them in SharedPreferences. Because this function is called during launch after the
      * library has loaded, they won't affect the next launch until Chrome is restarted.
      */
     private void cacheNativeFlags() {
         if (sIsFinishedCachingNativeFlags) return;
         FeatureUtilities.cacheNativeFlags(this);
         sIsFinishedCachingNativeFlags = true;
     }
 }