Created Mojo BudgetService implementation in chrome/browser

chrome/browser/budget_service/budget_service_impl.cc

+// Copyright 2016 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/browser/budget_service/budget_service_impl.h"
+
+#include "chrome/browser/budget_service/budget_manager.h"
+#include "chrome/browser/budget_service/budget_manager_factory.h"
+#include "chrome/browser/profiles/profile.h"
+#include "content/public/browser/render_process_host.h"
+
+namespace {
+
+BudgetManager::CostType budgetOperationTypeToBudgetManagerCostType(
+    blink::mojom::BudgetOperationType type) {
+  // Silent push is the only operation type supported currently.

[Peter Beverloo, 2016/08/23 10:13:30]

Now that we have the blink::mojom::BudgetOperationType type, can we drop
BudgetManager::CostType altogether to avoid duplication?

[harkness, 2016/08/23 10:48:33]

Good idea. Done.

+  return BudgetManager::CostType::SILENT_PUSH;
+}
+
+}  // namespace
+
+// static
+void BudgetServiceImpl::Create(int render_process_id,
+                               blink::mojom::BudgetServiceRequest request) {
+  new BudgetServiceImpl(render_process_id, std::move(request));
+}
+
+BudgetServiceImpl::BudgetServiceImpl(int render_process_id,
+                                     blink::mojom::BudgetServiceRequest request)
+    : render_process_id_(render_process_id),
+      binding_(this, std::move(request)) {}
+
+BudgetServiceImpl::~BudgetServiceImpl() = default;
+
+// blink::mojom::BudgetService implementation.

[Peter Beverloo, 2016/08/23 10:13:30]

nit: remove? Line 48 too. They don't really add value.

[harkness, 2016/08/23 10:48:33]

Done.

+void BudgetServiceImpl::GetCost(blink::mojom::BudgetOperationType type,
+                                const GetCostCallback& callback) {
+  // Query the BudgetManager for the cost and return it.
+  content::BrowserContext* context =
+      content::RenderProcessHost::FromID(render_process_id_)
+          ->GetBrowserContext();

[Peter Beverloo, 2016/08/23 10:13:30]

Mmm. DCHECK(context)?

[harkness, 2016/08/23 10:48:32]

Done.

+  BudgetManager* manager = BudgetManagerFactory::GetForProfile(context);
+  double cost =
+      manager->GetCost(budgetOperationTypeToBudgetManagerCostType(type));
+  callback.Run(cost);
+}
+
+// blink::mojom::BudgetService implementation.
+void BudgetServiceImpl::GetBudget(const url::Origin& origin,
+                                  const GetBudgetCallback& callback) {
+  // TODO(harkness) Call the BudgetManager once it supports detailed GetBudget
+  // calls.
+  callback.Run(0);
+}