Mac: implement orientation/motion shared memory data fetcher.

content/browser/device_orientation/data_fetcher_shared_memory.h

Index: content/browser/device_orientation/data_fetcher_shared_memory.h
diff --git a/content/browser/device_orientation/data_fetcher_shared_memory.h b/content/browser/device_orientation/data_fetcher_shared_memory.h
index 9d378eb25a09285135e2e6cd89056c9ad2883477..cbc274a51d2bdc74767a79441a1b512ea6a87801 100644
--- a/content/browser/device_orientation/data_fetcher_shared_memory.h
+++ b/content/browser/device_orientation/data_fetcher_shared_memory.h
@@ -7,6 +7,13 @@
 
 #include "content/browser/device_orientation/data_fetcher_shared_memory_base.h"
 
+#if defined(OS_MACOSX)
+#include "content/common/device_motion_hardware_buffer.h"
+#include "content/common/device_orientation/device_orientation_hardware_buffer.h"
+
+class SuddenMotionSensor;
+#endif
+
 namespace content {
 
 class CONTENT_EXPORT DataFetcherSharedMemory
@@ -21,6 +28,15 @@ class CONTENT_EXPORT DataFetcherSharedMemory
   virtual bool Start(ConsumerType consumer_type) OVERRIDE;
   virtual bool Stop(ConsumerType consumer_type) OVERRIDE;
 
+#if defined(OS_MACOSX)
+  virtual void Fetch(unsigned consumer_bitmask) OVERRIDE;
+  virtual bool IsPolling() const OVERRIDE;
+
+  DeviceMotionHardwareBuffer* motion_buffer_;
+  DeviceOrientationHardwareBuffer* orientation_buffer_;
+  scoped_ptr<SuddenMotionSensor> sudden_motion_sensor_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(DataFetcherSharedMemory);
 };