Add IPC plumbing code for Quota API

content/common/quota_dispatcher.h

+// Copyright (c) 2011 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.
+
+#ifndef CONTENT_COMMON_QUOTA_DISPATCHER_H_
+#define CONTENT_COMMON_QUOTA_DISPATCHER_H_
+
+#include <map>
+#include <set>
+
+#include "base/basictypes.h"
+#include "base/id_map.h"
+#include "ipc/ipc_channel.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageQuotaError.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageQuotaType.h"

[ericu, 2011/04/08 03:31:18]

Huh.  I've not previously hit this problem.  I don't think the style guide
covers #includes over 80 chars.  Do we wrap between the directive and the file
path?

[kinuko, 2011/04/08 09:02:53]

I've seen this happening in several files, like in
content/renderer/render_view.cc.  Seems like our convention is just leaving the
long header line as is.

+
+class GURL;
+
+namespace IPC {
+class Message;
+}
+
+namespace WebKit {
+class WebStorageQuotaCallbacks;
+}
+
+// Dispatches and sends quota related messages sent to/from a child
+// process from/to the main browser process.  There is one instance
+// per child process.  Messages are dispatched on the main child thread.
+class QuotaDispatcher : public IPC::Channel::Listener {
+ public:
+  QuotaDispatcher();
+  ~QuotaDispatcher();
+
+  // IPC::Channel::Listener implementation.
+  virtual bool OnMessageReceived(const IPC::Message& msg);
+
+  void QueryStorageUsageAndQuota(const GURL& gurl,
+                                 WebKit::WebStorageQuotaType type,
+                                 WebKit::WebStorageQuotaCallbacks* callbacks);
+  void RequestStorageQuota(const GURL& gurl,
+                           WebKit::WebStorageQuotaType type,
+                           unsigned long long requested_size,
+                           WebKit::WebStorageQuotaCallbacks* callbacks);
+
+ private:
+  // Message handlers.
+  void DidHandleRequestStorageQuota(int request_id,
+                                    WebKit::WebStorageQuotaError error,
+                                    int64 granted_quota);
+  void DidHandleUsageAndQuotaQuery(int request_id,
+                                   WebKit::WebStorageQuotaError error,
+                                   int64 current_usage,
+                                   int64 current_quota);
+
+  struct PendingQuotaCallbacks;
+  IDMap<PendingQuotaCallbacks, IDMapOwnPointer> pending_quota_callbacks_;
+
+  DISALLOW_COPY_AND_ASSIGN(QuotaDispatcher);
+};
+
+#endif  // CONTENT_COMMON_QUOTA_DISPATCHER_H_