Implement the Blink part of the Device Motion API.

Source/core/platform/chromium/DeviceMotion.cpp

Index: Source/core/platform/chromium/DeviceMotion.cpp
diff --git a/Source/core/platform/chromium/DeviceMotion.cpp b/Source/core/platform/chromium/DeviceMotion.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..82be71c62a3f6cff8c41e0431396536b859a4e6a
--- /dev/null
+++ b/Source/core/platform/chromium/DeviceMotion.cpp
@@ -0,0 +1,53 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+
+#include "core/platform/PlatformDeviceMotion.h"
+#include "platform/chromium/support/WebDeviceMotionDispatcher.h"
+
+namespace WebCore {
+
+void registerForDeviceMotionUpdates(DeviceMotionController* controller)
+{
+    WebKit::WebDeviceMotionDispatcher::shared().addController(controller);

[abarth-chromium, 2013/04/29 20:32:20]

I think Peter commented on this already, but you don't need to add this extra
layer of abstraction anymore.  Your code in modules/device_motion can just call
functions in Source/Platform/chromium/public directly.

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

Done.

+}
+
+void unregisterForDeviceMotionUpdates(DeviceMotionController* controller)
+{
+    WebKit::WebDeviceMotionDispatcher::shared().removeController(controller);
+}
+
+DeviceMotionData* latestDeviceMotionData()
+{
+    return WebKit::WebDeviceMotionDispatcher::shared().latestDeviceMotionData();
+}
+
+} // namespace WebCore