Convert profile import IPCs to Mojo

chrome/utility/profile_import_handler.cc

 // 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.
 
 #include "chrome/utility/profile_import_handler.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
-#include "chrome/common/importer/profile_import_process_messages.h"
 #include "chrome/utility/importer/external_process_importer_bridge.h"
 #include "chrome/utility/importer/importer.h"
 #include "chrome/utility/importer/importer_creator.h"
 #include "content/public/utility/utility_thread.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
 
-namespace {
-
-bool Send(IPC::Message* message) {
-  return content::UtilityThread::Get()->Send(message);
+// static
+void ProfileImportHandler::Create(
+    mojo::InterfaceRequest<chrome::mojom::ProfileImport> request) {
+  mojo::MakeStrongBinding(base::MakeUnique<ProfileImportHandler>(),
+                          std::move(request));
 }
 
-}  // namespace
-
 ProfileImportHandler::ProfileImportHandler() : items_to_import_(0) {}
 
 ProfileImportHandler::~ProfileImportHandler() {}
 
-bool ProfileImportHandler::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(ProfileImportHandler, message)
-    IPC_MESSAGE_HANDLER(ProfileImportProcessMsg_StartImport, OnImportStart)
-    IPC_MESSAGE_HANDLER(ProfileImportProcessMsg_CancelImport, OnImportCancel)
-    IPC_MESSAGE_HANDLER(ProfileImportProcessMsg_ReportImportItemFinished,
-                        OnImportItemFinished)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void ProfileImportHandler::OnImportStart(
+void ProfileImportHandler::StartImport(
     const importer::SourceProfile& source_profile,
     uint16_t items,
-    const base::DictionaryValue& localized_strings) {
+    const base::DictionaryValue& localized_strings,
+    chrome::mojom::ProfileImportObserverPtr observer) {
+  observer_ = std::move(observer);

[sky, 2016/11/14 23:12:18]

DCHECK(!observer_)?

[tibell, 2016/11/29 05:06:28]

Done.

   content::UtilityThread::Get()->EnsureBlinkInitialized();
   bridge_ = new ExternalProcessImporterBridge(

[sky, 2016/11/14 23:12:18]

ExternalProcessImporterBridge is ref counted. This code passes observer_ to
ExternalProcessImporterBridge. How do you know 'this' outlives
ExternalProcessImporterBridge?

[tibell, 2016/11/29 05:06:28]

I've now changed so there's only one owner of the InterfacePtr.

-      localized_strings,
-      content::UtilityThread::Get(),
-      base::ThreadTaskRunnerHandle::Get().get());
+      localized_strings, base::ThreadTaskRunnerHandle::Get(),
+      observer_.get());
   importer_ = importer::CreateImporterByType(source_profile.importer_type);
   if (!importer_.get()) {
-    Send(new ProfileImportProcessHostMsg_Import_Finished(
-        false, "Importer could not be created."));
+    observer_->OnImportFinished(false, "Importer could not be created.");
     return;
   }
 
   items_to_import_ = items;
 
   // Create worker thread in which importer runs.
   import_thread_.reset(new base::Thread("import_thread"));
 #if defined(OS_WIN)
   import_thread_->init_com_with_mta(false);
 #endif
   if (!import_thread_->Start()) {
     NOTREACHED();
     ImporterCleanup();
   }
   import_thread_->task_runner()->PostTask(
       FROM_HERE, base::Bind(&Importer::StartImport, importer_,
                             source_profile, items, base::RetainedRef(bridge_)));
 }
 
-void ProfileImportHandler::OnImportCancel() {
+void ProfileImportHandler::CancelImport() {
   ImporterCleanup();
 }
 
-void ProfileImportHandler::OnImportItemFinished(uint16_t item) {
+void ProfileImportHandler::ReportImportItemFinished(importer::ImportItem item) {
   items_to_import_ ^= item;  // Remove finished item from mask.
   // If we've finished with all items, notify the browser process.
   if (items_to_import_ == 0) {
-    Send(new ProfileImportProcessHostMsg_Import_Finished(true, std::string()));
+    observer_->OnImportFinished(true, std::string());
     ImporterCleanup();
   }
 }
 
 void ProfileImportHandler::ImporterCleanup() {
   importer_->Cancel();
   importer_ = NULL;
   bridge_ = NULL;
   import_thread_.reset();
   content::UtilityThread::Get()->ReleaseProcessIfNeeded();
 }