Adds filter support for offscreen canvas

third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp

Index: third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp b/third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp
index cc2e3c55ec01c2e2e1b1c4f62d5a482a6244c3a1..03afbc0f4e7be22c7c89a86f0d8f5479b7c4ff73 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp
@@ -29,6 +29,16 @@
 
 namespace blink {
 
+StyleResolverState::StyleResolverState(const ComputedStyle* parentStyle)
+    : m_document(nullptr)
+    , m_style(nullptr)
+    , m_parentStyle(const_cast<ComputedStyle*>(parentStyle))
+    , m_applyPropertyToRegularStyle(true)
+    , m_applyPropertyToVisitedLinkStyle(false)
+    , m_hasDirAutoAttribute(false)
+{
+}
+
 StyleResolverState::StyleResolverState(Document& document, const ElementResolveContext& elementContext, const ComputedStyle* parentStyle)
     : m_elementContext(elementContext)
     , m_document(document)