Make sandbox APIs more compatible with normal renderers

- Expose remote shortcuts for the `fs`, `os` and `child_process` modules.
- Expose the `url` and `timers` modules(the browserify versions)
- Add `process.crash` and `process.platform`

atom/renderer/atom_sandboxed_renderer_client.cc

@@ -9,6 +9,7 @@
 #include "atom_natives.h"  // NOLINT: This file is generated with js2c
 
 #include "atom/common/api/api_messages.h"
+#include "atom/common/api/atom_bindings.h"
 #include "atom/common/native_mate_converters/string16_converter.h"
 #include "atom/common/native_mate_converters/v8_value_converter.h"
 #include "atom/common/native_mate_converters/value_converter.h"
@@ -85,6 +86,7 @@ void InitializeBindings(v8::Local<v8::Object> binding,
   auto isolate = context->GetIsolate();
   mate::Dictionary b(isolate, binding);
   b.SetMethod("get", GetBinding);
+  b.SetMethod("crash", AtomBindings::Crash);
 }
 
 class AtomSandboxedRenderFrameObserver : public content::RenderFrameObserver {

electron.gyp

@@ -441,7 +441,13 @@
         'sandbox_args': [
           './lib/sandboxed_renderer/init.js',
           '-r',
-          './lib/sandboxed_renderer/api/exports/electron.js:electron'
+          './lib/sandboxed_renderer/api/exports/electron.js:electron',
+          '-r',
+          './lib/sandboxed_renderer/api/exports/fs.js:fs',
+          '-r',
+          './lib/sandboxed_renderer/api/exports/os.js:os',
+          '-r',
+          './lib/sandboxed_renderer/api/exports/child_process.js:child_process'
         ],
         'isolated_args': [
           'lib/isolated_renderer/init.js',

lib/sandboxed_renderer/api/exports/child_process.js

@@ -0,0 +1 @@
+module.exports = require('electron').remote.require('child_process')

lib/sandboxed_renderer/api/exports/fs.js

@@ -0,0 +1 @@
+module.exports = require('electron').remote.require('fs')

lib/sandboxed_renderer/api/exports/os.js

@@ -0,0 +1 @@
+module.exports = require('electron').remote.require('os')

lib/sandboxed_renderer/init.js

@@ -21,23 +21,23 @@ for (let prop of Object.keys(events.EventEmitter.prototype)) {
 Object.setPrototypeOf(process, events.EventEmitter.prototype)
 
 const electron = require('electron')
+const fs = require('fs')
 const preloadModules = new Map([
-  ['electron', electron]
+  ['child_process', require('child_process')],
+  ['electron', electron],
+  ['fs', fs],
+  ['os', require('os')],
+  ['url', require('url')],
+  ['timers', require('timers')]
 ])
 
-const extraModules = [
+const preloadSrc = fs.readFileSync(preloadPath).toString()
-  'fs'
-]
-for (let extraModule of extraModules) {
-  preloadModules.set(extraModule, electron.remote.require(extraModule))
-}
-
-// Fetch the preload script using the "fs" module proxy.
-let preloadSrc = preloadModules.get('fs').readFileSync(preloadPath).toString()
 
 // Pass different process object to the preload script(which should not have
 // access to things like `process.atomBinding`).
 const preloadProcess = new events.EventEmitter()
+preloadProcess.platform = electron.remote.process.platform
+preloadProcess.crash = () => binding.crash()
 process.on('exit', () => preloadProcess.emit('exit'))
 
 // This is the `require` function that will be visible to the preload script
@@ -67,12 +67,13 @@ function preloadRequire (module) {
 // and any `require('electron')` calls in `preload.js` will work as expected
 // since browserify won't try to include `electron` in the bundle, falling back
 // to the `preloadRequire` function above.
-let preloadWrapperSrc = `(function(require, process, Buffer, global) {
+const preloadWrapperSrc = `(function(require, process, Buffer, global, setImmediate) {
 ${preloadSrc}
 })`
 
 // eval in window scope:
 // http://www.ecma-international.org/ecma-262/5.1/#sec-10.4.2
 const geval = eval
-let preloadFn = geval(preloadWrapperSrc)
+const preloadFn = geval(preloadWrapperSrc)
-preloadFn(preloadRequire, preloadProcess, Buffer, global)
+const {setImmediate} = require('timers')
+preloadFn(preloadRequire, preloadProcess, Buffer, global, setImmediate)