[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 18a6b13982865b9395e58ab1e1e87a0061ffe668..c3ea3e1bc16f63373cae3b58480973a5af25e9cc 100644
--- a/content/content_browser.gypi
+++ b/content/content_browser.gypi
@@ -1675,6 +1675,8 @@
       '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',
@@ -1729,6 +1731,10 @@
       '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)',
@@ -2014,6 +2020,9 @@
         '../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',