[BlobAsync] Patch 3: Renderer Classes & Logic

content/child/blob_storage/blob_message_filter.cc

+// Copyright 2015 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.
+
+#include "content/child/blob_storage/blob_message_filter.h"
+
+#include "content/child/blob_storage/blob_transport_controller.h"
+#include "content/child/thread_safe_sender.h"
+#include "content/child/worker_task_runner.h"
+#include "content/common/blob_storage/blob_storage_messages.h"
+#include "ipc/ipc_message.h"
+#include "ipc/ipc_sender.h"
+#include "storage/common/blob_storage/blob_item_bytes_request.h"
+
+namespace content {
+
+BlobMessageFilter::BlobMessageFilter()
+    : IPC::MessageFilter(),
+      sender_(nullptr),
+      controller_(BlobTransportController::GetInstance()) {}
+
+BlobMessageFilter::~BlobMessageFilter() {}
+
+void BlobMessageFilter::OnFilterAdded(IPC::Sender* sender) {
+  sender_ = sender;
+}
+
+bool BlobMessageFilter::OnMessageReceived(const IPC::Message& message) {
+  DCHECK_EQ(0, WorkerTaskRunner::Instance()->CurrentWorkerId());
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(BlobMessageFilter, message)
+    IPC_MESSAGE_HANDLER(BlobStorageMsg_RequestMemoryItem, OnRequestMemoryItem)
+    IPC_MESSAGE_HANDLER(BlobStorageMsg_CancelBuildingBlob, OnCancelBuildingBlob)
+    IPC_MESSAGE_HANDLER(BlobStorageMsg_DoneBuildingBlob, OnDoneBuildingBlob)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+bool BlobMessageFilter::GetSupportedMessageClasses(
+    std::vector<uint32>* supported_message_classes) const {
+  supported_message_classes->push_back(BlobMsgStart);
+  return true;
+}
+
+void BlobMessageFilter::OnChannelClosing() {
+  controller_->OnChannelClose();
+}
+
+void BlobMessageFilter::OnRequestMemoryItem(
+    const std::string& uuid,
+    const std::vector<storage::BlobItemBytesRequest>& requests,
+    std::vector<base::SharedMemoryHandle> memory_handles,
+    const std::vector<IPC::PlatformFileForTransit>& file_handles) {
+  DCHECK_EQ(0, WorkerTaskRunner::Instance()->CurrentWorkerId());
+  controller_->OnMemoryRequest(uuid, requests, &memory_handles, file_handles,
+                               sender_);
+}
+void BlobMessageFilter::OnCancelBuildingBlob(
+    const std::string& uuid,
+    storage::IPCBlobCreationCancelCode code) {
+  DCHECK_EQ(0, WorkerTaskRunner::Instance()->CurrentWorkerId());
+  controller_->OnCancel(uuid, code);
+}
+
+void BlobMessageFilter::OnDoneBuildingBlob(const std::string& uuid) {
+  DCHECK_EQ(0, WorkerTaskRunner::Instance()->CurrentWorkerId());
+  controller_->OnDone(uuid);
+}
+
+}  // namespace content