Stop returning the true root path of each filesystem from openFileSystem....

webkit/fileapi/file_system_context.cc

Index: webkit/fileapi/file_system_context.cc
===================================================================
--- webkit/fileapi/file_system_context.cc	(revision 79142)
+++ webkit/fileapi/file_system_context.cc	(working copy)
@@ -9,6 +9,7 @@
 #include "googleurl/src/gurl.h"
 #include "webkit/fileapi/file_system_path_manager.h"
 #include "webkit/fileapi/file_system_usage_tracker.h"
+#include "webkit/fileapi/sandbox_mount_point_provider.h"
 
 namespace fileapi {
 
@@ -50,8 +51,8 @@
   DCHECK(file_message_loop_->BelongsToCurrentThread());
 
   std::string origin_identifier =
-      FileSystemPathManager::GetOriginIdentifierFromURL(origin_url);
-  FilePath path_for_origin = path_manager_->base_path().AppendASCII(
+      SandboxMountPointProvider::GetOriginIdentifierFromURL(origin_url);
+  FilePath path_for_origin = sandbox_provider()->base_path().AppendASCII(
       origin_identifier);
 
   file_util::Delete(path_for_origin, true /* recursive */);
@@ -65,4 +66,8 @@
   delete this;
 }
 
+SandboxMountPointProvider* FileSystemContext::sandbox_provider() const {
+  return path_manager_->sandbox_provider();
+}
+
 }  // namespace fileapi