[css-device-adapt] insertRule tests and ASSERT for device lengths.

Source/core/dom/ViewportArguments.cpp

Index: Source/core/dom/ViewportArguments.cpp
diff --git a/Source/core/dom/ViewportArguments.cpp b/Source/core/dom/ViewportArguments.cpp
index 8593f84c5e24c65a599df23b63b1bd621cda4c43..331ac12620b1295ac063911959889ecb8c06b741 100644
--- a/Source/core/dom/ViewportArguments.cpp
+++ b/Source/core/dom/ViewportArguments.cpp
@@ -103,41 +103,16 @@ PageScaleConstraints ViewportArguments::resolve(const FloatSize& initialViewport
     }
 
     if (type == ViewportArguments::CSSDeviceAdaptation) {
-        switch (int(resultMinWidth)) {
-        case ViewportArguments::ValueDeviceWidth:
-            resultMinWidth = deviceSize.width();
-            break;
-        case ViewportArguments::ValueDeviceHeight:
-            resultMinWidth = deviceSize.height();
-            break;
-        }
-
-        switch (int(resultMaxWidth)) {
-        case ViewportArguments::ValueDeviceWidth:
-            resultMaxWidth = deviceSize.width();
-            break;
-        case ViewportArguments::ValueDeviceHeight:
-            resultMaxWidth = deviceSize.height();
-            break;
-        }
 
-        switch (int(resultMinHeight)) {
-        case ViewportArguments::ValueDeviceWidth:
-            resultMinHeight = deviceSize.width();
-            break;
-        case ViewportArguments::ValueDeviceHeight:
-            resultMinHeight = deviceSize.height();
-            break;
-        }
-
-        switch (int(resultMaxHeight)) {
-        case ViewportArguments::ValueDeviceWidth:
-            resultMaxHeight = deviceSize.width();
-            break;
-        case ViewportArguments::ValueDeviceHeight:
-            resultMaxHeight = deviceSize.height();
-            break;
-        }
+        // device-width/device-height not supported for @viewport.
+        ASSERT(resultMinWidth != ViewportArguments::ValueDeviceWidth);
+        ASSERT(resultMinWidth != ViewportArguments::ValueDeviceHeight);
+        ASSERT(resultMaxWidth != ViewportArguments::ValueDeviceWidth);
+        ASSERT(resultMaxWidth != ViewportArguments::ValueDeviceHeight);
+        ASSERT(resultMinHeight != ViewportArguments::ValueDeviceWidth);
+        ASSERT(resultMinHeight != ViewportArguments::ValueDeviceHeight);
+        ASSERT(resultMaxHeight != ViewportArguments::ValueDeviceWidth);
+        ASSERT(resultMaxHeight != ViewportArguments::ValueDeviceHeight);
 
         if (resultMinWidth != ViewportArguments::ValueAuto || resultMaxWidth != ViewportArguments::ValueAuto)
             resultWidth = compareIgnoringAuto(resultMinWidth, compareIgnoringAuto(resultMaxWidth, deviceSize.width(), min), max);