Upstream the iOS web_shell and supporting code

ios/web/ios_web_shell.gyp

+# Copyright 2014 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.
+
+{
+  'variables': {
+    'chromium_code': 1,
+   },
+  'targets': [
+    {
+      'target_name': 'ios_web_shell',
+      'type': 'executable',
+      'mac_bundle': 1,
+      'include_dirs': [
+        '../..',
+      ],
+      'dependencies': [
+        'ios_web.gyp:ios_web',
+        'ios_web.gyp:ios_web_app',
+        '../../base/base.gyp:base',
+        '../../net/net.gyp:net',
+        '../../ui/base/ui_base.gyp:ui_base',
+      ],
+      'xcode_settings': {
+        'INFOPLIST_FILE': 'shell/Info.plist',
+        'OTHER_LDFLAGS': [
+          '-Xlinker -objc_abi_version -Xlinker 2'
+        ]
+      },
+      'sources': [
+        'shell/app_delegate.h',
+        'shell/app_delegate.mm',
+        'shell/shell_browser_state.h',
+        'shell/shell_browser_state.mm',
+        'shell/shell_main_delegate.h',
+        'shell/shell_main_delegate.mm',
+        'shell/shell_network_delegate.cc',
+        'shell/shell_network_delegate.h',
+        'shell/shell_url_request_context_getter.cc',
+        'shell/shell_url_request_context_getter.h',
+        'shell/shell_web_client.h',
+        'shell/shell_web_client.mm',
+        'shell/shell_web_main_parts.h',
+        'shell/shell_web_main_parts.mm',
+        'shell/view_controller.h',
+        'shell/view_controller.mm',
+        'shell/web_exe_main.mm',
+      ],
+      'mac_bundle_resources': [
+        'shell/Default.png',
+        'shell/MainView.xib',
+        'shell/textfield_background@2x.png',
+        'shell/toolbar_back@2x.png',
+        'shell/toolbar_forward@2x.png',
+      ],
+      'link_settings': {
+        'libraries': [
+          '$(SDKROOT)/System/Library/Frameworks/CoreGraphics.framework',
+          '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
+          '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
+          '$(SDKROOT)/System/Library/Frameworks/UIKit.framework',
+        ],
+      },
+    },
+  ],
+}