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

Source/WebCore/platform/chromium/DeviceMotionChromium.cpp

Index: Source/WebCore/platform/chromium/DeviceMotionChromium.cpp
diff --git a/Source/WebCore/platform/chromium/DeviceMotionChromium.cpp b/Source/WebCore/platform/chromium/DeviceMotionChromium.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..46902b5b78835a87fa7eee2dd76e1a4a9df7f364
--- /dev/null
+++ b/Source/WebCore/platform/chromium/DeviceMotionChromium.cpp
@@ -0,0 +1,57 @@
+/*
+ * 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 "PlatformDeviceMotion.h"

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

nit: empty line above the PlatformDeviceMotion.h include.

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

Done.

+
+#if ENABLE(DEVICE_ORIENTATION)

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

Please don't use compile-time guards for this code.

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

Done.

+
+#include "WebDeviceMotionEventPump.h"
+
+namespace WebCore {
+
+void startMonitoringDeviceMotion()
+{
+    WebKit::WebDeviceMotionEventPump::shared().start();

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

We'd now end up with three singleton objects.  Maybe it'd be better to keep
DeviceMotionController/DeviceOrientationController as a supplement to Page
(handling DOMWindow* registration), which can then register itself as a consumer
of the pump?

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

ok, switched back to the supplement to page approach. This also solves the
problem with exposing the page() method as public in DOMWindow.

+}
+
+void stopMonitoringDeviceMotion()
+{
+    WebKit::WebDeviceMotionEventPump::shared().stop();
+}
+
+DeviceMotionData* lastDeviceMotionData()
+{
+    return WebKit::WebDeviceMotionEventPump::shared().lastDeviceMotionData();
+}
+
+}
+
+#endif