[WIP] Provided file system from NACL.

content/content_browser.gypi

Index: content/content_browser.gypi
diff --git a/content/content_browser.gypi b/content/content_browser.gypi
index 65500f8f0fb7ed287915eba68350a4b9a55c7422..e4ecbbd801b13eaeaa6639a2370e575c6ad98f24 100644
--- a/content/content_browser.gypi
+++ b/content/content_browser.gypi
@@ -1615,6 +1615,8 @@
       'browser/renderer_host/pepper/pepper_file_io_host.h',
       'browser/renderer_host/pepper/pepper_file_ref_host.cc',
       'browser/renderer_host/pepper/pepper_file_ref_host.h',
+      'browser/renderer_host/pepper/pepper_filesystem_provider_host.cc',
+      'browser/renderer_host/pepper/pepper_filesystem_provider_host.h',
       'browser/renderer_host/pepper/pepper_file_system_browser_host.cc',
       'browser/renderer_host/pepper/pepper_file_system_browser_host.h',
       'browser/renderer_host/pepper/pepper_flash_file_message_filter.cc',
@@ -1669,6 +1671,10 @@
       'browser/renderer_host/pepper/ssl_context_helper.h',
       'public/browser/plugin_service.h',
     ],
+    'plugin_browser_chromeos_sources': [
+      'browser/renderer_host/pepper/pepper_filesystem_provider_backend_chromeos.cc',
+      'browser/renderer_host/pepper/pepper_filesystem_provider_backend_chromeos.h'
+    ],	
   },
   'sources': [
     '<@(public_browser_sources)',
@@ -1952,6 +1958,9 @@
         '../chromeos/chromeos.gyp:chromeos',
         '../chromeos/chromeos.gyp:power_manager_proto',
       ],
+      'sources': [
+        '<@(plugin_browser_chromeos_sources)',
+      ],
       'sources!': [
         'browser/device_sensors/data_fetcher_shared_memory_default.cc',
         'browser/geolocation/wifi_data_provider_linux.cc',