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"
+
+// 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;
+
+void BudgetServiceImpl::GetCost(blink::mojom::BudgetOperationType type,
+                                const GetCostCallback& callback) {
+  // The RenderProcessHost should still be alive as long as any connections are
+  // alive, and if the BudgetService mojo connection is down, the
+  // BudgetServiceImpl should have been destroyed.
+  content::RenderProcessHost* host =
+      content::RenderProcessHost::FromID(render_process_id_);
+  DCHECK(host);
+
+  // Query the BudgetManager for the cost and return it.
+  content::BrowserContext* context = host->GetBrowserContext();
+  double cost = BudgetManagerFactory::GetForProfile(context)->GetCost(type);
+  callback.Run(cost);
+}
+
+void BudgetServiceImpl::GetBudget(const url::Origin& origin,
+                                  const GetBudgetCallback& callback) {
+  // TODO(harkness) Call the BudgetManager once it supports detailed GetBudget
+  // calls.
+  callback.Run(0);
+}