Implement SkImageFilter support in the compositor.

cc/layer_impl_unittest.cc

Index: cc/layer_impl_unittest.cc
diff --git a/cc/layer_impl_unittest.cc b/cc/layer_impl_unittest.cc
index acaac9b6c0ca76ffbdc6463031aca7c2a6ef8b94..d2a4975bf1b4b211ea2f5cf827b94969a7d92885 100644
--- a/cc/layer_impl_unittest.cc
+++ b/cc/layer_impl_unittest.cc
@@ -11,6 +11,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include <public/WebFilterOperation.h>
 #include <public/WebFilterOperations.h>
+#include "SkBlurImageFilter.h"
 
 using namespace cc;
 using namespace WebKit;
@@ -82,6 +83,7 @@ TEST(CCLayerImplTest, verifyLayerChangesAreTrackedProperly)
     arbitraryTransform.scale3d(0.1, 0.2, 0.3);
     WebFilterOperations arbitraryFilters;
     arbitraryFilters.append(WebFilterOperation::createOpacityFilter(0.5));
+    SkAutoTUnref<SkImageFilter> arbitraryFilter(new SkBlurImageFilter(SK_Scalar1, SK_Scalar1));
 
     // These properties are internal, and should not be considered "change" when they are used.
     EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->setUseLCDText(true));
@@ -98,6 +100,7 @@ TEST(CCLayerImplTest, verifyLayerChangesAreTrackedProperly)
     EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->setAnchorPoint(arbitraryFloatPoint));
     EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->setAnchorPointZ(arbitraryNumber));
     EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->setFilters(arbitraryFilters));
+    EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->setFilter(arbitraryFilter));
     EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->setMaskLayer(CCLayerImpl::create(4)));
     EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->setMasksToBounds(true));
     EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->setContentsOpaque(true));