CSS Typed OM: asMatrix for TransformComponent with LengthValue types

third_party/WebKit/Source/core/css/cssom/PerspectiveTransformComponent.cpp

Index: third_party/WebKit/Source/core/css/cssom/PerspectiveTransformComponent.cpp
diff --git a/third_party/WebKit/Source/core/css/cssom/PerspectiveTransformComponent.cpp b/third_party/WebKit/Source/core/css/cssom/PerspectiveTransformComponent.cpp
index 56e633860af5d54c461eea46d1cb7d5239065dba..f82677915bcdeaaa7de374495cdbc38a0f2e2e70 100644
--- a/third_party/WebKit/Source/core/css/cssom/PerspectiveTransformComponent.cpp
+++ b/third_party/WebKit/Source/core/css/cssom/PerspectiveTransformComponent.cpp
@@ -5,6 +5,7 @@
 #include "core/css/cssom/PerspectiveTransformComponent.h"
 
 #include "bindings/core/v8/ExceptionState.h"
+#include "core/css/cssom/MatrixTransformComponent.h"
 
 namespace blink {
 
@@ -17,6 +18,14 @@ PerspectiveTransformComponent* PerspectiveTransformComponent::create(const Lengt
     return new PerspectiveTransformComponent(length);
 }
 
+MatrixTransformComponent* PerspectiveTransformComponent::asMatrix(ExceptionState& exceptionState) const
+{
+    double lengthPx = m_length->computeLengthPx(exceptionState);
+    if (exceptionState.hadException())
+        return nullptr;
+    return MatrixTransformComponent::perspective(lengthPx);
+}
+
 PassRefPtrWillBeRawPtr<CSSFunctionValue> PerspectiveTransformComponent::toCSSValue() const
 {
     RefPtrWillBeRawPtr<CSSFunctionValue> result = CSSFunctionValue::create(CSSValuePerspective);