Implement Android shared memory data fetcher for Device Motion.

content/browser/device_orientation/device_motion_provider.cc

Index: content/browser/device_orientation/device_motion_provider.cc
diff --git a/content/browser/device_orientation/device_motion_provider.cc b/content/browser/device_orientation/device_motion_provider.cc
index 218ee58d8ac30a9e3299f12e62acc49a0e9153fa..6db5d06ca51cb324cf8ecfea3ef58a178efd35f6 100644
--- a/content/browser/device_orientation/device_motion_provider.cc
+++ b/content/browser/device_orientation/device_motion_provider.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "base/logging.h"
+#include "content/browser/device_orientation/data_fetcher_shared_memory.h"
 #include "content/browser/device_orientation/device_motion_provider.h"
 #include "content/common/device_motion_hardware_buffer.h"
 
@@ -18,6 +19,7 @@ DeviceMotionProvider::DeviceMotionProvider()
 }
 
 DeviceMotionProvider::~DeviceMotionProvider() {
+  StopFetchingDeviceMotionData();
 }
 
 base::SharedMemoryHandle DeviceMotionProvider::GetSharedMemoryHandleForProcess(
@@ -30,13 +32,13 @@ base::SharedMemoryHandle DeviceMotionProvider::GetSharedMemoryHandleForProcess(
 void DeviceMotionProvider::StartFetchingDeviceMotionData() {
   if (is_started_)
     return;
-  // FIXME: call data_fetcher_->StartFetchingDeviceMotionData(
-  // SharedMemoryAsHardwareBuffer());
+  DataFetcherSharedMemory::instance()->StartFetchingDeviceMotionData(
+      SharedMemoryAsHardwareBuffer());
   is_started_ = true;
 }
 
 void DeviceMotionProvider::StopFetchingDeviceMotionData() {
-  // FIXME: call data_fetcher_->StopFetchingDeviceMotionData();
+  DataFetcherSharedMemory::instance()->StopFetchingDeviceMotionData();
   is_started_ = false;
 }