Implement the content/renderer and content/browser part of the Device Motion API.

content/browser/device_orientation/data_fetcher_impl_android.h

Index: content/browser/device_orientation/data_fetcher_impl_android.h
diff --git a/content/browser/device_orientation/data_fetcher_impl_android.h b/content/browser/device_orientation/data_fetcher_impl_android.h
index 4f431e0da117ab2b64d52c7b1c038dad3c86fba4..56bb53364f2e12aef10b2ea3035a7b3054d3c033 100644
--- a/content/browser/device_orientation/data_fetcher_impl_android.h
+++ b/content/browser/device_orientation/data_fetcher_impl_android.h
@@ -9,6 +9,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "content/browser/device_orientation/data_fetcher.h"
+#include "content/browser/device_orientation/data_fetcher_shared_memory.h"
 #include "content/browser/device_orientation/device_data.h"
 
 namespace content {
@@ -23,11 +24,14 @@ class Orientation;
 // previous value if any). Chrome calls GetDeviceData() which reads the most
 // recent value. Repeated calls to GetDeviceData() will return the same value.
 
-class DataFetcherImplAndroid : public DataFetcher {
+class DataFetcherImplAndroid
+    : public DataFetcher, public DataFetcherSharedMemory {
  public:
   // Must be called at startup, before Create().
   static void Init(JNIEnv* env);
 
+  static DataFetcherImplAndroid* instance();
+
   // Factory function. We'll listen for events for the lifetime of this object.
   // Returns NULL on error.
   static DataFetcher* Create();
@@ -47,15 +51,25 @@ class DataFetcherImplAndroid : public DataFetcher {
   // Implementation of DataFetcher.
   virtual const DeviceData* GetDeviceData(DeviceData::Type type) OVERRIDE;
 
- private:
+  // Implementation of the new API using shared memory.
+
+  virtual bool needsPolling() { return false; }
+  virtual bool FetchDeviceMotionDataIntoBuffer();
+  virtual bool StartFetchingDeviceMotionData(
+      DeviceMotionHardwareBuffer* buffer);
+  virtual void StopFetchingDeviceMotionData();
+
+ public:
   DataFetcherImplAndroid();
   const Orientation* GetOrientation();
 
   // Wrappers for JNI methods.
   // TODO(timvolodine): move the DeviceData::Type enum to the service class
   // once it is implemented.
-  bool Start(DeviceData::Type event_type, int rate_in_milliseconds);
-  void Stop(DeviceData::Type event_type);
+  virtual bool Start(DeviceData::Type event_type, int rate_in_milliseconds);
+  virtual void Stop(DeviceData::Type event_type);
+
+  void CheckBufferReadyToRead();
 
   virtual int GetNumberActiveDeviceMotionSensors();
 
@@ -68,6 +82,12 @@ class DataFetcherImplAndroid : public DataFetcher {
 
   // The Java provider of orientation info.
   base::android::ScopedJavaGlobalRef<jobject> device_orientation_;
+  int number_active_device_motion_sensors_;
+  int receivedMotionData[3];
+  DeviceMotionHardwareBuffer* device_motion_buffer_;
+  bool is_buffer_ready_;
+
+  DataFetcher* data_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(DataFetcherImplAndroid);
 };