Convert device_sensors to use mojo.

content/renderer/device_sensors/device_motion_event_pump_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 "content/renderer/device_sensors/device_motion_event_pump.h"
 
 #include <string.h>
 
 #include <memory>
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/common/device_sensors/device_motion_hardware_buffer.h"
 #include "content/public/test/test_utils.h"
+#include "mojo/public/cpp/system/buffer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/modules/device_orientation/WebDeviceMotionListener.h"
 
 namespace content {
 
 class MockDeviceMotionListener : public blink::WebDeviceMotionListener {
  public:
   MockDeviceMotionListener()
       : did_change_device_motion_(false), number_of_events_(0) {
     memset(&data_, 0, sizeof(data_));
@@ skipping 31 matching lines @@
   ~DeviceMotionEventPumpForTesting() override {}
 
   void set_stop_on_fire_event(bool stop_on_fire_event) {
     stop_on_fire_event_ = stop_on_fire_event;
   }
 
   bool stop_on_fire_event() { return stop_on_fire_event_; }
 
   int pump_delay_microseconds() const { return pump_delay_microseconds_; }
 
-  void OnDidStart(base::SharedMemoryHandle renderer_handle) {
-    DeviceMotionEventPump::OnDidStart(renderer_handle);
+  void DidStart(mojo::ScopedSharedBufferHandle renderer_handle) {
+    DeviceMotionEventPump::DidStart(std::move(renderer_handle));
   }
   void SendStartMessage() override {}
   void SendStopMessage() override {}
   void FireEvent() override {
     DeviceMotionEventPump::FireEvent();
     if (stop_on_fire_event_) {
       Stop();
       base::MessageLoop::current()->QuitWhenIdle();
     }
   }
 
  private:
   bool stop_on_fire_event_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceMotionEventPumpForTesting);
 };
 
 class DeviceMotionEventPumpTest : public testing::Test {
  public:
-  DeviceMotionEventPumpTest() {
-    EXPECT_TRUE(shared_memory_.CreateAndMapAnonymous(
-        sizeof(DeviceMotionHardwareBuffer)));
-  }
+  DeviceMotionEventPumpTest() = default;
 
  protected:
   void SetUp() override {
-    const DeviceMotionHardwareBuffer* null_buffer = nullptr;
     listener_.reset(new MockDeviceMotionListener);
     motion_pump_.reset(new DeviceMotionEventPumpForTesting);
-    buffer_ = static_cast<DeviceMotionHardwareBuffer*>(shared_memory_.memory());
-    ASSERT_NE(null_buffer, buffer_);
-    memset(buffer_, 0, sizeof(DeviceMotionHardwareBuffer));
-    ASSERT_TRUE(shared_memory_.ShareToProcess(base::GetCurrentProcessHandle(),
-        &handle_));
+    shared_memory_ =
+        mojo::SharedBufferHandle::Create(sizeof(DeviceMotionHardwareBuffer));
+    mapping_ = shared_memory_->Map(sizeof(DeviceMotionHardwareBuffer));
+    ASSERT_TRUE(mapping_);
+    memset(buffer(), 0, sizeof(DeviceMotionHardwareBuffer));
   }
 
   void InitBuffer(bool allAvailableSensorsActive) {
-    blink::WebDeviceMotionData& data = buffer_->data;
+    blink::WebDeviceMotionData& data = buffer()->data;
     data.accelerationX = 1;
     data.hasAccelerationX = true;
     data.accelerationY = 2;
     data.hasAccelerationY = true;
     data.accelerationZ = 3;
     data.hasAccelerationZ = true;
     data.allAvailableSensorsAreActive = allAvailableSensorsActive;
   }
 
   MockDeviceMotionListener* listener() { return listener_.get(); }
   DeviceMotionEventPumpForTesting* motion_pump() { return motion_pump_.get(); }
-  base::SharedMemoryHandle handle() { return handle_; }
+  mojo::ScopedSharedBufferHandle handle() {
+    return shared_memory_->Clone(
+        mojo::SharedBufferHandle::AccessMode::READ_ONLY);
+  }
+  DeviceMotionHardwareBuffer* buffer() {
+    return reinterpret_cast<DeviceMotionHardwareBuffer*>(mapping_.get());
+  }
 
  private:
+  base::MessageLoop loop_;
   std::unique_ptr<MockDeviceMotionListener> listener_;
   std::unique_ptr<DeviceMotionEventPumpForTesting> motion_pump_;
-  base::SharedMemoryHandle handle_;
-  base::SharedMemory shared_memory_;
-  DeviceMotionHardwareBuffer* buffer_;
+  mojo::ScopedSharedBufferHandle shared_memory_;
+  mojo::ScopedSharedBufferMapping mapping_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceMotionEventPumpTest);
 };
 
 TEST_F(DeviceMotionEventPumpTest, DidStartPolling) {
-  base::MessageLoopForUI loop;
-
   InitBuffer(true);
 
   motion_pump()->Start(listener());
-  motion_pump()->OnDidStart(handle());
+  motion_pump()->DidStart(handle());
 
   base::MessageLoop::current()->Run();
 
   const blink::WebDeviceMotionData& received_data = listener()->data();
   EXPECT_TRUE(listener()->did_change_device_motion());
   EXPECT_TRUE(received_data.hasAccelerationX);
   EXPECT_EQ(1, static_cast<double>(received_data.accelerationX));
   EXPECT_TRUE(received_data.hasAccelerationX);
   EXPECT_EQ(2, static_cast<double>(received_data.accelerationY));
   EXPECT_TRUE(received_data.hasAccelerationY);
   EXPECT_EQ(3, static_cast<double>(received_data.accelerationZ));
   EXPECT_TRUE(received_data.hasAccelerationZ);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityX);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityY);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityZ);
   EXPECT_FALSE(received_data.hasRotationRateAlpha);
   EXPECT_FALSE(received_data.hasRotationRateBeta);
   EXPECT_FALSE(received_data.hasRotationRateGamma);
 }
 
 TEST_F(DeviceMotionEventPumpTest, DidStartPollingNotAllSensorsActive) {
-  base::MessageLoopForUI loop;
-
   InitBuffer(false);
 
   motion_pump()->Start(listener());
-  motion_pump()->OnDidStart(handle());
+  motion_pump()->DidStart(handle());
 
   base::MessageLoop::current()->Run();
 
   const blink::WebDeviceMotionData& received_data = listener()->data();
   // No change in device motion because allAvailableSensorsAreActive is false.
   EXPECT_FALSE(listener()->did_change_device_motion());
   EXPECT_FALSE(received_data.hasAccelerationX);
   EXPECT_FALSE(received_data.hasAccelerationX);
   EXPECT_FALSE(received_data.hasAccelerationY);
   EXPECT_FALSE(received_data.hasAccelerationZ);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityX);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityY);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityZ);
   EXPECT_FALSE(received_data.hasRotationRateAlpha);
   EXPECT_FALSE(received_data.hasRotationRateBeta);
   EXPECT_FALSE(received_data.hasRotationRateGamma);
 }
 
 // Confirm that the frequency of pumping events is not greater than 60Hz. A rate
 // above 60Hz would allow for the detection of keystrokes (crbug.com/421691)
 TEST_F(DeviceMotionEventPumpTest, PumpThrottlesEventRate) {
   // Confirm that the delay for pumping events is 60 Hz.
   EXPECT_GE(60, base::Time::kMicrosecondsPerSecond /
       motion_pump()->pump_delay_microseconds());
 
-  base::MessageLoopForUI loop;
-
   InitBuffer(true);
 
   motion_pump()->set_stop_on_fire_event(false);
   motion_pump()->Start(listener());
-  motion_pump()->OnDidStart(handle());
+  motion_pump()->DidStart(handle());
 
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
       base::TimeDelta::FromMilliseconds(100));
   base::MessageLoop::current()->Run();
   motion_pump()->Stop();
 
   // Check that the blink::WebDeviceMotionListener does not receive excess
   // events.
   EXPECT_TRUE(listener()->did_change_device_motion());
   EXPECT_GE(6, listener()->number_of_events());
 }
 
 }  // namespace content