Implement Android shared memory data fetcher for Device Motion.

content/browser/device_orientation/device_motion_provider.h

Index: content/browser/device_orientation/device_motion_provider.h
diff --git a/content/browser/device_orientation/device_motion_provider.h b/content/browser/device_orientation/device_motion_provider.h
index 90a3e72934dd847c5a4eecf33c259e003953eb8b..a5b94c923baea9918a08bd77bf43013fda6cc234 100644
--- a/content/browser/device_orientation/device_motion_provider.h
+++ b/content/browser/device_orientation/device_motion_provider.h
@@ -11,8 +11,7 @@
 #include "content/common/device_motion_hardware_buffer.h"
 
 namespace content {
-
-// TODO(timvolodine): Add data fetcher to this class.
+class DataFetcherSharedMemory;
 
 class CONTENT_EXPORT DeviceMotionProvider {
  public:
@@ -34,8 +33,7 @@ class CONTENT_EXPORT DeviceMotionProvider {
 
   DeviceMotionHardwareBuffer* SharedMemoryAsHardwareBuffer();
 
-  // TODO(timvolodine): add member variable,
-  // scoped_ptr<DataFetcherSharedMemory> data_fetcher_;
+  scoped_ptr<DataFetcherSharedMemory> data_fetcher_;
 
   bool is_started_;