WebKit & WebCore part of the device motion implementation using the platform layer.

Source/Platform/chromium/public/WebDeviceMotionReader.h

Index: Source/Platform/chromium/public/WebDeviceMotionReader.h
diff --git a/Source/Platform/chromium/public/WebDeviceMotionReader.h b/Source/Platform/chromium/public/WebDeviceMotionReader.h
new file mode 100644
index 0000000000000000000000000000000000000000..3afdb836da5ed4a64d8c29c0f72943efd7835531
--- /dev/null
+++ b/Source/Platform/chromium/public/WebDeviceMotionReader.h
@@ -0,0 +1,51 @@
+/*
+ * 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 WebDeviceMotionReader_h
+#define WebDeviceMotionReader_h
+
+#include "WebDeviceMotionData.h"
+
+namespace WebKit {
+
+// FIXME(timvolodine) : abstract this into a common superclass, to be used with device orientation as well.

[Peter Beverloo, 2013/04/09 17:29:53]

nit: Blink style uses unattributed FIXMEs.

[timvolodine, 2013/04/10 19:06:12]

Done.

+class WebDeviceMotionReader {
+public:
+    WebDeviceMotionReader() { }
+    virtual ~WebDeviceMotionReader() { }
+
+    virtual void lastDeviceMotionData(WebDeviceMotionData&) = 0;

[Peter Beverloo, 2013/04/09 17:29:53]

latestDeviceMotionData?

[Peter Beverloo, 2013/04/09 17:29:53]

Since this is an API, I'd prefer some more documentation on what exactly will
happen when someone calls startUpdating() or stopUpdating(), and what the
"latestDeviceMotionData" means (i.e. it doesn't update live).

[timvolodine, 2013/04/10 19:06:12]

I've tried to keep the same naming similar to how it used to be in the clients.
But latest sounds better indeed, so fixed this.

[timvolodine, 2013/04/10 19:06:12]

Done.

+    virtual void startUpdating() = 0;
+    virtual void stopUpdating() = 0;
+};
+
+} // namespace WebKit
+
+#endif // WebDeviceMotionReader_h