Adds filter support for offscreen canvas

third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp

Index: third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp
diff --git a/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp b/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp
index 72000926bf2f48aeef54bd80c41870358ee995d4..268c3bb7f1be61de48ee6c685ad765c0d8127997 100644
--- a/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp
+++ b/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp
@@ -53,10 +53,10 @@ void OffscreenCanvasRenderingContext2D::commit(ScriptState* scriptState,
     // If an OffscreenCanvas has no associated canvas Id, it indicates that
     // it is not an OffscreenCanvas created by transfering control from html
     // canvas.
-    exceptionState.throwDOMException(InvalidStateError,
-                                     "Commit() was called on a context whose "
-                                     "OffscreenCanvas is not associated with a "
-                                     "canvas element.");
+    exceptionState.throwDOMException(
+        InvalidStateError,
+        "Commit() was called on a context whose OffscreenCanvas is not "
+        "associated with a canvas element.");
     return;
   }
   double commitStartTime = WTF::monotonicallyIncreasingTime();
@@ -78,9 +78,9 @@ bool OffscreenCanvasRenderingContext2D::wouldTaintOrigin(
     CanvasImageSource* source,
     ExecutionContext* executionContext) {
   if (executionContext->isWorkerGlobalScope()) {
-    // We only support passing in ImageBitmap and OffscreenCanvases as source
-    // images in drawImage() or createPattern() in a OffscreenCanvas2d in
-    // worker.
+    // We only support passing in ImageBitmap and OffscreenCanvases as
+    // source images in drawImage() or createPattern() in a
+    // OffscreenCanvas2d in worker.
     DCHECK(source->isImageBitmap() || source->isOffscreenCanvas());
   }
 
@@ -218,17 +218,15 @@ AffineTransform OffscreenCanvasRenderingContext2D::baseTransform() const {
 void OffscreenCanvasRenderingContext2D::didDraw(const SkIRect& dirtyRect) {}
 
 bool OffscreenCanvasRenderingContext2D::stateHasFilter() {
-  // TODO: crbug.com/593838 make hasFilter accept nullptr
-  // return state().hasFilter(nullptr, nullptr, IntSize(width(), height()),
-  // this);
-  return false;
+  return state().hasFilterForOffscreenCanvas(getOffscreenCanvas()->size());
 }
 
 sk_sp<SkImageFilter> OffscreenCanvasRenderingContext2D::stateGetFilter() {
-  // TODO: make getFilter accept nullptr
-  // return state().getFilter(nullptr, nullptr, IntSize(width(), height()),
-  // this);
-  return nullptr;
+  return state().getFilterForOffscreenCanvas(getOffscreenCanvas()->size());
+}
+
+void OffscreenCanvasRenderingContext2D::setFilter(const String& filterString) {
+  BaseRenderingContext2D::setFilter(filterString);
 }
 
 void OffscreenCanvasRenderingContext2D::validateStateStack() const {