Move most of the component updater artifacts to update_client.

components/update_client/component_patcher.cc

Index: components/update_client/component_patcher.cc
diff --git a/components/update_client/component_patcher.cc b/components/update_client/component_patcher.cc
new file mode 100644
index 0000000000000000000000000000000000000000..651756e1b9d016011b97175f75764a2dee49be6d
--- /dev/null
+++ b/components/update_client/component_patcher.cc
@@ -0,0 +1,121 @@
+// Copyright 2014 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 "components/update_client/component_patcher.h"
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/json/json_file_value_serializer.h"
+#include "base/location.h"
+#include "base/memory/weak_ptr.h"
+#include "base/values.h"
+#include "components/update_client/component_patcher_operation.h"
+
+namespace update_client {
+
+namespace {
+
+// Deserialize the commands file (present in delta update packages). The top
+// level must be a list.
+base::ListValue* ReadCommands(const base::FilePath& unpack_path) {
+  const base::FilePath commands =
+      unpack_path.Append(FILE_PATH_LITERAL("commands.json"));
+  if (!base::PathExists(commands))
+    return NULL;
+
+  JSONFileValueSerializer serializer(commands);
+  scoped_ptr<base::Value> root(serializer.Deserialize(NULL, NULL));
+
+  return (root.get() && root->IsType(base::Value::TYPE_LIST))
+             ? static_cast<base::ListValue*>(root.release())
+             : NULL;
+}
+
+}  // namespace
+
+ComponentPatcher::ComponentPatcher(
+    const base::FilePath& input_dir,
+    const base::FilePath& unpack_dir,
+    ComponentInstaller* installer,
+    scoped_refptr<OutOfProcessPatcher> out_of_process_patcher,
+    scoped_refptr<base::SequencedTaskRunner> task_runner)
+    : input_dir_(input_dir),
+      unpack_dir_(unpack_dir),
+      installer_(installer),
+      out_of_process_patcher_(out_of_process_patcher),
+      task_runner_(task_runner) {
+}
+
+ComponentPatcher::~ComponentPatcher() {
+}
+
+void ComponentPatcher::Start(const ComponentUnpacker::Callback& callback) {
+  callback_ = callback;
+  task_runner_->PostTask(FROM_HERE,
+                         base::Bind(&ComponentPatcher::StartPatching,
+                                    scoped_refptr<ComponentPatcher>(this)));
+}
+
+void ComponentPatcher::StartPatching() {
+  commands_.reset(ReadCommands(input_dir_));
+  if (!commands_.get()) {
+    DonePatching(ComponentUnpacker::kDeltaBadCommands, 0);
+  } else {
+    next_command_ = commands_->begin();
+    PatchNextFile();
+  }
+}
+
+void ComponentPatcher::PatchNextFile() {
+  if (next_command_ == commands_->end()) {
+    DonePatching(ComponentUnpacker::kNone, 0);
+    return;
+  }
+  if (!(*next_command_)->IsType(base::Value::TYPE_DICTIONARY)) {
+    DonePatching(ComponentUnpacker::kDeltaBadCommands, 0);
+    return;
+  }
+  const base::DictionaryValue* command_args =
+      static_cast<base::DictionaryValue*>(*next_command_);
+
+  std::string operation;
+  if (command_args->GetString(kOp, &operation)) {
+    current_operation_ =
+        CreateDeltaUpdateOp(operation, out_of_process_patcher_);
+  }
+
+  if (!current_operation_.get()) {
+    DonePatching(ComponentUnpacker::kDeltaUnsupportedCommand, 0);
+    return;
+  }
+  current_operation_->Run(command_args, input_dir_, unpack_dir_, installer_,
+                          base::Bind(&ComponentPatcher::DonePatchingFile,
+                                     scoped_refptr<ComponentPatcher>(this)),
+                          task_runner_);
+}
+
+void ComponentPatcher::DonePatchingFile(ComponentUnpacker::Error error,
+                                        int extended_error) {
+  if (error != ComponentUnpacker::kNone) {
+    DonePatching(error, extended_error);
+  } else {
+    ++next_command_;
+    PatchNextFile();
+  }
+}
+
+void ComponentPatcher::DonePatching(ComponentUnpacker::Error error,
+                                    int extended_error) {
+  current_operation_ = NULL;
+  task_runner_->PostTask(FROM_HERE,
+                         base::Bind(callback_, error, extended_error));
+  callback_.Reset();
+}
+
+}  // namespace update_client