[Sensors] Improvements in shared buffer managing

device/generic_sensor/platform_sensor_provider_unittest.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 "device/generic_sensor/fake_platform_sensor.h"
 #include "device/generic_sensor/fake_platform_sensor_provider.h"
 #include "device/generic_sensor/public/interfaces/sensor_provider.mojom.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace device {
 
 using mojom::SensorInitParams;
 using mojom::SensorType;
 
-namespace {
-
-uint64_t GetBufferOffset(mojom::SensorType type) {
-  return (static_cast<uint64_t>(SensorType::LAST) -
-          static_cast<uint64_t>(type)) *
-         SensorInitParams::kReadBufferSize;
-}
-
-}  // namespace
-
 class PlatformSensorTestClient : public PlatformSensor::Client {
  public:
   PlatformSensorTestClient()
       : notification_suspended_(false),
         sensor_reading_changed_(false),
         sensor_error_(false) {}
 
   ~PlatformSensorTestClient() override {
     if (sensor_)
       sensor_->RemoveClient(this);
@@ skipping 26 matching lines @@
   bool sensor_error_;
 };
 
 class PlatformSensorProviderTest : public ::testing::Test {
  public:
   PlatformSensorProviderTest()
       : sensor_client_(new PlatformSensorTestClient()) {}
 
  protected:
   scoped_refptr<PlatformSensor> CreateSensor(mojom::SensorType type) {
-    return FakePlatformSensorProvider::GetInstance()->CreateSensor(
-        type, SensorInitParams::kReadBufferSize, GetBufferOffset(type));
+    return FakePlatformSensorProvider::GetInstance()->CreateSensor(type);
   }
 
   std::unique_ptr<PlatformSensorTestClient> sensor_client_;
 };
 
 TEST_F(PlatformSensorProviderTest, CreateSensorsAndCheckType) {
   scoped_refptr<PlatformSensor> sensor1 =
       CreateSensor(SensorType::AMBIENT_LIGHT);
   EXPECT_TRUE(sensor1);
   EXPECT_EQ(SensorType::AMBIENT_LIGHT, sensor1->GetType());
@@ skipping 225 matching lines @@
   sensor_client_->set_notification_suspended(false);
   EXPECT_FALSE(sensor_client_->IsNotificationSuspended());
   for (const auto& client : clients)
     EXPECT_FALSE(client->IsNotificationSuspended());
 
   fake_sensor->UpdateSensor();
   EXPECT_TRUE(fake_sensor->started());
 }
 
 }  // namespace device