Implement the filesystem proxy. This allows the FileRef tests to pass in the...

webkit/plugins/ppapi/ppb_file_system_impl.cc

Index: webkit/plugins/ppapi/ppb_file_system_impl.cc
===================================================================
--- webkit/plugins/ppapi/ppb_file_system_impl.cc	(revision 75471)
+++ webkit/plugins/ppapi/ppb_file_system_impl.cc	(working copy)
@@ -12,6 +12,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginContainer.h"
 #include "webkit/fileapi/file_system_types.h"
+#include "webkit/plugins/ppapi/common.h"
 #include "webkit/plugins/ppapi/file_callbacks.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 #include "webkit/plugins/ppapi/plugin_module.h"
@@ -31,11 +32,22 @@
   if (!plugin_instance)
     return 0;
 
+  if (type != PP_FILESYSTEMTYPE_EXTERNAL &&
+      type != PP_FILESYSTEMTYPE_LOCALPERSISTENT &&
+      type != PP_FILESYSTEMTYPE_LOCALTEMPORARY)
+    return 0;
+
   PPB_FileSystem_Impl* file_system =
       new PPB_FileSystem_Impl(plugin_instance, type);
   return file_system->GetReference();
 }
 
+PP_Bool IsFileSystem(PP_Resource resource) {
+  scoped_refptr<PPB_FileSystem_Impl> file_system(
+      Resource::GetAs<PPB_FileSystem_Impl>(resource));
+  return BoolToPPBool(!!file_system.get());
+}
+
 int32_t Open(PP_Resource file_system_id,
              int64 expected_size,
              PP_CompletionCallback callback) {
@@ -66,9 +78,19 @@
   return PP_ERROR_WOULDBLOCK;
 }
 
+PP_FileSystemType_Dev GetType(PP_Resource resource) {
+  scoped_refptr<PPB_FileSystem_Impl> file_system(
+      Resource::GetAs<PPB_FileSystem_Impl>(resource));
+  if (!file_system)
+    return PP_FILESYSTEMTYPE_NONE;
+  return file_system->type();
+}
+
 const PPB_FileSystem_Dev ppb_filesystem = {
   &Create,
-  &Open
+  &IsFileSystem,
+  &Open,
+  &GetType
 };
 
 }  // namespace
@@ -79,6 +101,7 @@
       instance_(instance),
       type_(type),
       opened_(false) {
+  DCHECK(type_ != PP_FILESYSTEMTYPE_NONE);
 }
 
 PPB_FileSystem_Impl* PPB_FileSystem_Impl::AsPPB_FileSystem_Impl() {