Implement the Blink part of the Device Motion API.

Source/core/platform/chromium/support/WebDeviceMotionData.cpp

+/*
+ * 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
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+ *     * 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
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+ * 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
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+ * (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 <public/WebDeviceMotionData.h>
+
+#include "wtf/PassRefPtr.h"
+#include <modules/device_orientation/DeviceMotionData.h>
+
+namespace WebKit {
+
+WebDeviceMotionData::WebDeviceMotionData()
+    : interval(0)
+    , hasAccelerationX(false)
+    , hasAccelerationY(false)
+    , hasAccelerationZ(false)
+    , hasAccelerationIncludingGravityX(false)
+    , hasAccelerationIncludingGravityY(false)
+    , hasAccelerationIncludingGravityZ(false)
+    , hasRotationRateAlpha(false)
+    , hasRotationRateBeta(false)
+    , hasRotationRateGamma(false)
+{

[darin (slow to review), 2013/05/16 19:41:15]

you should probably memset the entire data structure instead.  see WebInputEvent
for reference.

the current code leaves some of the memory uninitialized, and that will create
issues for some of the valgrind-based memory tests.

this constructor should have no member initializers.  instead just do a big fat
memset(this, 0, sizeof(*this));

[timvolodine, 2013/05/17 13:36:38]

Done.

+}
+
+WebDeviceMotionData::operator PassRefPtr<WebCore::DeviceMotionData>() const
+{
+    return WebCore::DeviceMotionData::create(
+        WebCore::DeviceMotionData::Acceleration::create(
+            hasAccelerationX, accelerationX,
+            hasAccelerationY, accelerationY,
+            hasAccelerationZ, accelerationZ),
+        WebCore::DeviceMotionData::Acceleration::create(
+            hasAccelerationIncludingGravityX, accelerationIncludingGravityX,
+            hasAccelerationIncludingGravityY, accelerationIncludingGravityY,
+            hasAccelerationIncludingGravityZ, accelerationIncludingGravityZ),
+        WebCore::DeviceMotionData::RotationRate::create(
+            hasRotationRateAlpha, rotationRateAlpha,
+            hasRotationRateBeta, rotationRateBeta,
+            hasRotationRateGamma, rotationRateGamma),
+        true, interval);
+}
+
+} // namespace WebKit