diff --git a/atom.gyp b/atom.gyp
index 63562cfa4e71..5b87367bd495 100644
--- a/atom.gyp
+++ b/atom.gyp
@@ -12,7 +12,6 @@
     ],
     'coffee_sources': [
       'browser/api/lib/app.coffee',
-      'browser/api/lib/atom-delegate.coffee',
       'browser/api/lib/auto-updater.coffee',
       'browser/api/lib/browser-window.coffee',
       'browser/api/lib/dialog.coffee',
diff --git a/browser/api/atom_browser_bindings.h b/browser/api/atom_browser_bindings.h
index d110fadd6f72..004518cc6edd 100644
--- a/browser/api/atom_browser_bindings.h
+++ b/browser/api/atom_browser_bindings.h
@@ -40,14 +40,7 @@ class AtomBrowserBindings : public AtomBindings {
                              NativeWindow* sender,
                              IPC::Message* message);
 
-  // The require('atom').browserMainParts object.
-  v8::Handle<v8::Object> browser_main_parts() {
-    return browser_main_parts_.NewHandle();
-  }
-
  private:
-  ScopedPersistent<v8::Object> browser_main_parts_;
-
   DISALLOW_COPY_AND_ASSIGN(AtomBrowserBindings);
 };
 
diff --git a/browser/api/lib/atom-delegate.coffee b/browser/api/lib/atom-delegate.coffee
deleted file mode 100644
index f38491e725ed..000000000000
--- a/browser/api/lib/atom-delegate.coffee
+++ /dev/null
@@ -1 +0,0 @@
-module.exports = global.__atom
diff --git a/browser/default_app/default_app.js b/browser/default_app/default_app.js
index dd43d8296dcb..092a193326a8 100644
--- a/browser/default_app/default_app.js
+++ b/browser/default_app/default_app.js
@@ -1,6 +1,5 @@
 var app = require('app');
 var dialog = require('dialog');
-var delegate = require('atom-delegate');
 var ipc = require('ipc');
 var Menu = require('menu');
 var MenuItem = require('menu-item');
diff --git a/browser/lib/init.coffee b/browser/lib/init.coffee
index a9393f16aa5d..551efffdeee6 100644
--- a/browser/lib/init.coffee
+++ b/browser/lib/init.coffee
@@ -21,18 +21,6 @@ if process.platform is 'win32'
   stdin.push null
   process.__defineGetter__ 'stdin', -> stdin
 
-# Provide default Content API implementations.
-atom = {}
-
-atom.browserMainParts =
-  preMainMessageLoopRun: ->
-    # This is the start of the whole application, usually we should initialize
-    # the main window here.
-
-# Store atom object in global scope, apps can just override methods of it to
-# implement various logics.
-global.__atom = atom
-
 # Add browser/api/lib to require's search paths,
 # which contains javascript part of Atom's built-in libraries.
 globalPaths = require('module').globalPaths
diff --git a/docs/README.md b/docs/README.md
index 77b2eb449c61..6433da3cf160 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -22,7 +22,6 @@ Renderer side modules:
 Browser side modules:
 
 * [app](api/browser/app.md)
-* [atom-delegate](api/browser/atom-delegate.md)
 * [auto-updater](api/browser/auto-updater.md)
 * [browser-window](api/browser/browser-window.md)
 * [dialog](api/browser/dialog.md)
diff --git a/docs/api/browser/atom-delegate.md b/docs/api/browser/atom-delegate.md
deleted file mode 100644
index b172a77d5d12..000000000000
--- a/docs/api/browser/atom-delegate.md
+++ /dev/null
@@ -1,31 +0,0 @@
-# atom-delegate
-
-The `atom-delegate` returns the delegate object for Chrome Content API. The
-atom-shell would call methods of the delegate object when the corresponding
-C++ code is called. Developers can override methods of it to control the
-underlying behaviour of the browser.
-
-An example of creating a new window when the browser is initialized:
-
-```javascript
-var delegate = require('atom-delegate');  // Delegate of Content API.
-var BrowserWindow = require('browser-window');  // Module to create native browser window.
-
-// Keep a global reference of the window object, if you don't, the window will
-// be closed automatically when the javascript object is GCed.
-var mainWindow = null;
-
-// This method will be called when atom-shell has done everything
-// initialization and ready for creating browser windows.
-delegate.browserMainParts.preMainMessageLoopRun = function() {
-  // Create the browser window,
-  mainWindow = new BrowserWindow({ width: 800, height: 600 });
-  // and load the index.html of the app.
-  mainWindow.loadUrl('file://' + __dirname + '/index.html');
-}
-```
-
-## atom-delegate.browserMainParts.preMainMessageLoopRun()
-
-Called when atom-shell has done everything initialization and ready for
-creating browser windows.
diff --git a/docs/quick-start.md b/docs/quick-start.md
index 5ba8e85b1e51..eb0b3cbf5d3e 100644
--- a/docs/quick-start.md
+++ b/docs/quick-start.md
@@ -53,7 +53,6 @@ every piece of the app. An example of `main.js` is:
 
 ```javascript
 var app = require('app');  // Module to control application life.
-var delegate = require('atom_delegate');  // Delegate of Content API.
 var Window = require('window');  // Module to create native browser window.
 
 // Keep a global reference of the window object, if you don't, the window will
@@ -67,7 +66,7 @@ app.on('window-all-closed', function() {
 
 // This method will be called when atom-shell has done everything
 // initialization and ready for creating browser windows.
-delegate.browserMainParts.preMainMessageLoopRun = function() {
+app.on('finish-launching', function() {
   // Create the browser window,
   mainWindow = new Window({ width: 800, height: 600 });
   // and load the index.html of the app.
@@ -89,7 +88,7 @@ delegate.browserMainParts.preMainMessageLoopRun = function() {
     // when you should delete the corresponding element.
     mainWindow = null;
   });
-}
+});
 ```
 
 Finally the `index.html` is the web page you want to show, in fact you