Implement the Blink part of the Device Motion API.

Source/core/platform/PlatformDeviceMotion.h

Index: Source/core/platform/PlatformDeviceMotion.h
diff --git a/Source/core/platform/PlatformDeviceMotion.h b/Source/core/platform/PlatformDeviceMotion.h
new file mode 100644
index 0000000000000000000000000000000000000000..8e85e286d398a5ea0870229c20f435fc85ebfd7c
--- /dev/null
+++ b/Source/core/platform/PlatformDeviceMotion.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef PlatformDeviceMotion_h
+#define PlatformDeviceMotion_h
+
+#include <wtf/PassRefPtr.h>

[Peter Beverloo, 2013/04/29 17:38:03]

PassRefPtr isn't used in this header.

[timvolodine, 2013/04/30 12:40:18]

Done.

+#include "modules/device_orientation/DeviceMotionData.h"
+
+namespace WebCore {
+
+class DeviceMotionController;
+class DeviceMotionData;
+
+void registerForDeviceMotionUpdates(DeviceMotionController*);

[Peter Beverloo, 2013/04/29 17:38:03]

I wonder if it'd be acceptable now to just include WebDeviceMotionDispatcher.h
and call that directly?  That'd severely limit the amount of code you need to
add to core/.

[timvolodine, 2013/04/30 12:40:18]

Done.

+void unregisterForDeviceMotionUpdates(DeviceMotionController*);
+DeviceMotionData* latestDeviceMotionData();
+
+}

[Peter Beverloo, 2013/04/29 17:38:03]

nit: // namespace WebCore

[timvolodine, 2013/04/30 12:40:18]

Done.

+
+#endif // PlatformDeviceMotion_h