Implement the file chooser as a new resource "host"

content/content_renderer.gypi

Index: content/content_renderer.gypi
diff --git a/content/content_renderer.gypi b/content/content_renderer.gypi
index 8f26bf3df56c6725032d2e9f55a895a1f30da61a..d42533c7cd9e2b22ab5059d5d1582fa1c5a09758 100644
--- a/content/content_renderer.gypi
+++ b/content/content_renderer.gypi
@@ -6,6 +6,7 @@
   'dependencies': [
     '../jingle/jingle.gyp:jingle_glue',
     '../net/net.gyp:net',
+    '../ppapi/ppapi_internal.gyp:ppapi_host',
     '../ppapi/ppapi_internal.gyp:ppapi_proxy',
     '../ppapi/ppapi_internal.gyp:ppapi_shared',
     '../skia/skia.gyp:skia',
@@ -18,6 +19,7 @@
     '<(webkit_src_dir)/Source/WebKit/chromium/WebKit.gyp:webkit',
     '../ui/surface/surface.gyp:surface',
     '../v8/tools/gyp/v8.gyp:v8',
+    '../webkit/support/webkit_support.gyp:glue',
     '../webkit/support/webkit_support.gyp:webkit_media',
     '../webkit/support/webkit_support.gyp:webkit_gpu',
   ],
@@ -138,12 +140,18 @@
     'renderer/notification_provider.h',
     'renderer/paint_aggregator.cc',
     'renderer/paint_aggregator.h',
+    'renderer/pepper/content_renderer_pepper_host_factory.cc',
+    'renderer/pepper/content_renderer_pepper_host_factory.h',
     'renderer/pepper/pepper_broker_impl.cc',
     'renderer/pepper/pepper_broker_impl.h',
     'renderer/pepper/pepper_device_enumeration_event_handler.cc',
     'renderer/pepper/pepper_device_enumeration_event_handler.h',
+    'renderer/pepper/pepper_file_chooser_host.cc',
+    'renderer/pepper/pepper_file_chooser_host.h',
     'renderer/pepper/pepper_hung_plugin_filter.cc',
     'renderer/pepper/pepper_hung_plugin_filter.h',
+    'renderer/pepper/pepper_in_process_resource_creation.cc',
+    'renderer/pepper/pepper_in_process_resource_creation.h',
     'renderer/pepper/pepper_parent_context_provider.cc',
     'renderer/pepper/pepper_parent_context_provider.h',
     'renderer/pepper/pepper_platform_audio_input_impl.cc',