Make CSSStyleImageValue a member of CanvasImageSource.

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

Index: third_party/WebKit/Source/core/css/cssom/CSSStyleImageValue.cpp
diff --git a/third_party/WebKit/Source/core/css/cssom/CSSStyleImageValue.cpp b/third_party/WebKit/Source/core/css/cssom/CSSStyleImageValue.cpp
index 3f6a5c0ba3b60ddc465ce67fd99193080fca459a..c1d006916364b5b78c69ab8f7240d1fb1b087c97 100644
--- a/third_party/WebKit/Source/core/css/cssom/CSSStyleImageValue.cpp
+++ b/third_party/WebKit/Source/core/css/cssom/CSSStyleImageValue.cpp
@@ -6,7 +6,7 @@
 
 namespace blink {
 
-double CSSStyleImageValue::intrinsicWidth(bool& isNull)
+double CSSStyleImageValue::intrinsicWidth(bool& isNull) const
 {
     isNull = isCachePending();
     if (isNull)
@@ -14,7 +14,7 @@ double CSSStyleImageValue::intrinsicWidth(bool& isNull)
     return imageLayoutSize().width().toDouble();
 }
 
-double CSSStyleImageValue::intrinsicHeight(bool& isNull)
+double CSSStyleImageValue::intrinsicHeight(bool& isNull) const
 {
     isNull = isCachePending();
     if (isNull)
@@ -35,4 +35,36 @@ double CSSStyleImageValue::intrinsicRatio(bool& isNull)
     return intrinsicWidth(isNull) / intrinsicHeight(isNull);
 }
 
+FloatSize CSSStyleImageValue::elementSize(const FloatSize& defaultObjectSize) const
+{
+    bool notUsed;
+    return FloatSize(intrinsicWidth(notUsed), intrinsicHeight(notUsed));
+}
+
+int CSSStyleImageValue::sourceHeight()
+{
+    bool notUsed;
+    return intrinsicHeight(notUsed);
+}
+
+int CSSStyleImageValue::sourceWidth()
+{
+    bool notUsed;
+    return intrinsicWidth(notUsed);
+}
+
+PassRefPtr<Image> CSSStyleImageValue::getSourceImageForCanvas(SourceImageStatus* status, AccelerationHint, SnapshotReason,
+    const FloatSize&) const
+{
+    if (isCachePending())
+        return nullptr;
+    // cachedImage can be null if image is StyleInvalidImage
+    ImageResource* cachedImage = m_imageValue->cachedImage()->cachedImage();
+    if (cachedImage) {
+        // getImage() returns the nullImage() if the image is not available yet
+        return cachedImage->getImage()->imageForDefaultFrame();
+    }
+    return nullptr;
+}
+
 } // namespace blink