Support file system access in DevTools with isolated file system.

content/common/devtools_messages.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Developer tools consist of the following parts:
 //
 // DevToolsAgent lives in the renderer of an inspected page and provides access
 // to the pages resources, DOM, v8 etc. by means of IPC messages.
 //
 // DevToolsClient is a thin delegate that lives in the tools front-end
@@ skipping 120 matching lines @@
                     std::string /* url */,
                     std::string /* content */,
                     bool /* save_as */)
 
 // Appends given |content| to the file that has been associated with the
 // given |url| by Save message handler.
 IPC_MESSAGE_ROUTED2(DevToolsHostMsg_Append,
                     std::string /* url */,
                     std::string /* content */)
 
+// Requests the list of file systems added for devtools previously.
+IPC_MESSAGE_ROUTED0(DevToolsHostMsg_RequestFilesystems)
+
+// Shows a dialog to select a folder to add an isolated file system for.
+IPC_MESSAGE_ROUTED0(DevToolsHostMsg_AddFilesystem)
+
+// Removes previously added devtools file system by given |file_system_path|.
+IPC_MESSAGE_ROUTED1(DevToolsHostMsg_RemoveFilesystem,
+                    std::string /* file_system_path */)
+
 // Updates agent runtime state stored in devtools manager in order to support
 // cross-navigation instrumentation.
 IPC_MESSAGE_ROUTED1(DevToolsHostMsg_SaveAgentRuntimeState,
                     std::string /* state */)
 
 // Clears browser cache.
 IPC_MESSAGE_ROUTED0(DevToolsHostMsg_ClearBrowserCache)
 
 // Clears browser cookies.
 IPC_MESSAGE_ROUTED0(DevToolsHostMsg_ClearBrowserCookies)
 
 
 //-----------------------------------------------------------------------------
 // These are messages sent from the inspected page renderer to the worker
 // renderer.