Convert device_sensors to use mojo.

content/renderer/device_sensors/device_motion_event_pump_unittest.cc

Index: content/renderer/device_sensors/device_motion_event_pump_unittest.cc
diff --git a/content/renderer/device_sensors/device_motion_event_pump_unittest.cc b/content/renderer/device_sensors/device_motion_event_pump_unittest.cc
index bdba6c1688af91306375e5f4e0163d41d8c3985d..651f5cfb1463c30db45607dfd49d18561c184508 100644
--- a/content/renderer/device_sensors/device_motion_event_pump_unittest.cc
+++ b/content/renderer/device_sensors/device_motion_event_pump_unittest.cc
@@ -15,6 +15,7 @@
 #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"
 
@@ -66,8 +67,8 @@ class DeviceMotionEventPumpForTesting : public DeviceMotionEventPump {
 
   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 {}
@@ -87,25 +88,21 @@ class DeviceMotionEventPumpForTesting : public DeviceMotionEventPump {
 
 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;
@@ -117,25 +114,29 @@ class DeviceMotionEventPumpTest : public testing::Test {
 
   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();
 
@@ -157,12 +158,10 @@ TEST_F(DeviceMotionEventPumpTest, DidStartPolling) {
 }
 
 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();
 
@@ -188,13 +187,11 @@ TEST_F(DeviceMotionEventPumpTest, PumpThrottlesEventRate) {
   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(),