ATK accessibility support for web content on Aura Linux.

content/content_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../device/battery/battery.gyp:device_battery',
     '../device/battery/battery.gyp:device_battery_mojo_bindings',
@@ skipping 1896 matching lines @@
           'VCLinkerTool': {
             'DelayLoadDLLs': [
               'dinput8.dll',
               'user32.dll',
               'dwmapi.dll',
             ],
           },
         },
       },
     }],
+    ['OS=="linux" and chromecast==0 and chromeos==0 and use_x11==1', {

[shreeramk, 2015/07/14 05:21:00]

Second problem is related to cast shell for linux.

If chromecast is "0", then cast shell linux target while compiling will not be
able to find the baseclass of browseraccessibilitymanager since the check
applied here https://codereview.chromium.org/1128183010/patch/220001/230008 and
currently it is a platform check.

So, other option left is chromecast==1. But on making chromecast==1, still cast
shell linux is not able to find the subclass because I think its not able to
satisfy the condition properly hence the files are not getting compiled.

+      'dependencies': [
+        '../build/linux/system.gyp:atk',
+        '../build/linux/system.gyp:gconf',
+        '../build/linux/system.gyp:glib',
+      ],
+      'variables': {
+        'clang_warning_flags': [
+          # glib uses the pre-c++11 typedef-as-static_assert hack.
+          '-Wno-unused-local-typedefs',
+        ],
+      },
+      'sources': [

[shreeramk, 2015/07/14 05:21:00]

Is this correct to add the files specific to the platform inside the check or do
I need to add in the "private_browser_sources" list and exclude it for the
platforms where it doesn't have to get compiled.

+        'browser/accessibility/accessibility_tree_formatter_auralinux.cc',
+        'browser/accessibility/browser_accessibility_auralinux.cc',
+        'browser/accessibility/browser_accessibility_auralinux.h',
+        'browser/accessibility/browser_accessibility_manager_auralinux.cc',
+        'browser/accessibility/browser_accessibility_manager_auralinux.h',
+      ],
+    }],
     ['OS=="linux"', {
       'dependencies': [
         '../sandbox/sandbox.gyp:libc_urandom_override',
       ],
     }],
     ['use_udev == 1', {
       'dependencies': [
         '../device/udev_linux/udev.gyp:udev_linux',
       ],
     }, {
@@ skipping 172 matching lines @@
       'sources': [
         'browser/vr/vr_device.cc',
         'browser/vr/vr_device.h',
         'browser/vr/vr_device_manager.cc',
         'browser/vr/vr_device_manager.h',
         'browser/vr/vr_device_provider.h',
       ]
     }],
   ],
 }