Create GPUMetricsProvider.

chrome/browser/metrics/gpu_metrics_provider_unittest.cc

+// 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 "chrome/browser/metrics/gpu_metrics_provider.h"
+
+#include "base/basictypes.h"
+#include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/size.h"
+
+namespace {
+
+const int kScreenWidth = 1024;
+const int kScreenHeight = 768;
+const int kScreenCount = 3;
+const float kScreenScaleFactor = 2;
+
+class TestGPUMetricsProvider : public GPUMetricsProvider {
+ public:
+  TestGPUMetricsProvider() {}
+

[Alexei Svitkine (slow), 2014/05/20 14:16:37]

Nit: Remove blank line.

[blundell, 2014/05/20 14:20:49]

Done.

+  virtual ~TestGPUMetricsProvider() {}
+
+ private:
+  virtual gfx::Size GetScreenSize() const OVERRIDE {
+    return gfx::Size(kScreenWidth, kScreenHeight);
+  }
+
+  virtual float GetScreenDeviceScaleFactor() const OVERRIDE {
+    return kScreenScaleFactor;
+  }
+
+  virtual int GetScreenCount() const OVERRIDE {
+    return kScreenCount;
+  }
+};

[Alexei Svitkine (slow), 2014/05/20 14:16:37]

Nit: Add DISALLOW_COPY_AND_ASSIGN().

[blundell, 2014/05/20 14:20:49]

Done.

+
+}  // namespace
+
+class GPUMetricsProviderTest : public testing::Test {
+ public:
+  GPUMetricsProviderTest() {}
+  virtual ~GPUMetricsProviderTest() {}
+
+  DISALLOW_COPY_AND_ASSIGN(GPUMetricsProviderTest);

[Alexei Svitkine (slow), 2014/05/20 14:16:37]

Nit: Put this in the private section.

[blundell, 2014/05/20 14:20:49]

Done.

+};
+
+TEST_F(GPUMetricsProviderTest, ProvideSystemProfileMetrics) {
+  TestGPUMetricsProvider provider;
+  metrics::ChromeUserMetricsExtension uma_proto;
+
+  provider.ProvideSystemProfileMetrics(uma_proto.mutable_system_profile());
+
+  // Check that the system profile has the correct values set.
+  const metrics::SystemProfileProto::Hardware& hardware =
+      uma_proto.system_profile().hardware();
+  EXPECT_EQ(kScreenWidth, hardware.primary_screen_width());
+  EXPECT_EQ(kScreenHeight, hardware.primary_screen_height());
+  EXPECT_EQ(kScreenScaleFactor, hardware.primary_screen_scale_factor());
+  EXPECT_EQ(kScreenCount, hardware.screen_count());
+}