[fsp] Add support for reading directories.

chrome/browser/chromeos/file_system_provider/fake_provided_file_system.cc

Index: chrome/browser/chromeos/file_system_provider/fake_provided_file_system.cc
diff --git a/chrome/browser/chromeos/file_system_provider/fake_provided_file_system.cc b/chrome/browser/chromeos/file_system_provider/fake_provided_file_system.cc
index 8e54dd05d96b22eab5de8cd248f98179b3fa1f4f..f27aeb01fb4ad1f32c00f6802c0a272a72cf68fd 100644
--- a/chrome/browser/chromeos/file_system_provider/fake_provided_file_system.cc
+++ b/chrome/browser/chromeos/file_system_provider/fake_provided_file_system.cc
@@ -4,12 +4,31 @@
 
 #include "chrome/browser/chromeos/file_system_provider/fake_provided_file_system.h"
 
+#include <string>
+
 #include "base/files/file.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "extensions/browser/event_router.h"
 
 namespace chromeos {
 namespace file_system_provider {
+namespace {
+
+// Adds a fake entry to the entry list.
+void AddDirectoryEntry(fileapi::AsyncFileUtil::EntryList* entry_list,
+                       const std::string& name,
+                       fileapi::DirectoryEntry::DirectoryEntryType type,
+                       int64 size,
+                       std::string last_modified_time_string) {
+  base::Time last_modified_time;
+  const bool result = base::Time::FromString(last_modified_time_string.c_str(),
+                                             &last_modified_time);
+  DCHECK(result);
+  entry_list->push_back(
+      fileapi::DirectoryEntry(name, type, size, last_modified_time));
+}
+
+}  // namespace
 
 FakeProvidedFileSystem::FakeProvidedFileSystem(
     const ProvidedFileSystemInfo& file_system_info)
@@ -50,6 +69,55 @@ void FakeProvidedFileSystem::GetMetadata(
       FROM_HERE, base::Bind(callback, base::File::FILE_OK, file_info));
 }
 
+void FakeProvidedFileSystem::ReadDirectory(
+    const base::FilePath& directory_path,
+    const fileapi::AsyncFileUtil::ReadDirectoryCallback& callback) {
+  // Return fake contents for the root directory only.
+  if (directory_path.AsUTF8Unsafe() != "/") {
+    base::MessageLoopProxy::current()->PostTask(
+        FROM_HERE,
+        base::Bind(callback,
+                   base::File::FILE_ERROR_NOT_FOUND,
+                   fileapi::AsyncFileUtil::EntryList(),
+                   false /* has_more */));
+    return;
+  }
+
+  {
+    fileapi::AsyncFileUtil::EntryList entry_list;
+    AddDirectoryEntry(&entry_list,
+                      "hello.txt",
+                      fileapi::DirectoryEntry::FILE,
+                      1024 /* size */,
+                      "Thu Apr 24 00:46:52 UTC 2014");
+
+    AddDirectoryEntry(&entry_list,
+                      "world.txt",
+                      fileapi::DirectoryEntry::FILE,
+                      1024 /* size */,
+                      "Wed Apr 23 00:20:30 UTC 2014");
+
+    base::MessageLoopProxy::current()->PostTask(
+        FROM_HERE,
+        base::Bind(
+            callback, base::File::FILE_OK, entry_list, true /* has_more */));
+  }
+
+  {
+    fileapi::AsyncFileUtil::EntryList entry_list;
+    AddDirectoryEntry(&entry_list,
+                      "pictures",
+                      fileapi::DirectoryEntry::DIRECTORY,
+                      0 /* size */,
+                      "Tue May 22 00:40:50 UTC 2014");
+
+    base::MessageLoopProxy::current()->PostTask(
+        FROM_HERE,
+        base::Bind(
+            callback, base::File::FILE_OK, entry_list, false /* has_more */));
+  }
+}
+
 const ProvidedFileSystemInfo& FakeProvidedFileSystem::GetFileSystemInfo()
     const {
   return file_system_info_;