Add more WebVR layout tests, adjust test format

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

Index: third_party/WebKit/Source/modules/vr/VRDisplay.cpp
diff --git a/third_party/WebKit/Source/modules/vr/VRDisplay.cpp b/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
index c35e7f133671d7e0e39b8124b7fbd0ee82798014..9e20a901b11a7c5e11b9405bc3e5b1cec7b92e52 100644
--- a/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
+++ b/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
@@ -558,6 +558,7 @@ void VRDisplay::updateLayerBounds() {
     leftBounds->top = 0.0f;
     leftBounds->width = 0.5f;
     leftBounds->height = 1.0f;
+    m_layer.setLeftBounds({0.0f, 0.0f, 0.5f, 1.0f});
   }
 
   if (m_layer.rightBounds().size() == 4) {
@@ -571,6 +572,7 @@ void VRDisplay::updateLayerBounds() {
     rightBounds->top = 0.0f;
     rightBounds->width = 0.5f;
     rightBounds->height = 1.0f;
+    m_layer.setRightBounds({0.5f, 0.0f, 0.5f, 1.0f});
   }
 
   m_display->UpdateLayerBounds(std::move(leftBounds), std::move(rightBounds));