Updated Blink WebVR interfaces to WebVR v1 spec

third_party/WebKit/Source/modules/vr/VRDisplayCollection.cpp

Index: third_party/WebKit/Source/modules/vr/VRDisplayCollection.cpp
diff --git a/third_party/WebKit/Source/modules/vr/VRDisplayCollection.cpp b/third_party/WebKit/Source/modules/vr/VRDisplayCollection.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4a8e399318d9105e302216eb7ff1e2afc2b4d910
--- /dev/null
+++ b/third_party/WebKit/Source/modules/vr/VRDisplayCollection.cpp
@@ -0,0 +1,53 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/vr/VRDisplayCollection.h"
+
+#include "modules/vr/NavigatorVR.h"
+
+namespace blink {
+
+VRDisplayCollection::VRDisplayCollection(NavigatorVR* navigatorVR)
+    : m_navigatorVR(navigatorVR)
+{
+}
+
+VRDisplayVector VRDisplayCollection::updateDisplays(const WebVector<WebVRDevice>& devices)
+{
+    VRDisplayVector vrDevices;
+
+    for (const auto& device : devices) {
+        VRDisplay* display = getDisplayForIndex(device.index);
+        if (!display) {
+            display = new VRDisplay(m_navigatorVR);
+            m_displays.append(display);
+        }
+
+        display->updateFromWebVRDevice(device);
+        vrDevices.append(display);
+    }
+
+    return vrDevices;
+}
+
+VRDisplay* VRDisplayCollection::getDisplayForIndex(unsigned index)
+{
+    VRDisplay* display;
+    for (size_t i = 0; i < m_displays.size(); ++i) {
+        display = m_displays[i];
+        if (display->displayId() == index) {
+            return display;
+        }
+    }
+
+    return 0;
+}
+
+DEFINE_TRACE(VRDisplayCollection)
+{
+    visitor->trace(m_navigatorVR);
+    visitor->trace(m_displays);
+}
+
+} // namespace blink