[WIP] Plumbing for paint

third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h

Index: third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h
diff --git a/third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h b/third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h
index fb48bccdbec20fe9ba20f239a7f58c7503807aa5..261b899341d869de5d6c51027b5c86909deb4095 100644
--- a/third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h
+++ b/third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h
@@ -8,9 +8,14 @@
 #include "bindings/core/v8/ScriptValue.h"
 #include "core/dom/ExecutionContext.h"
 #include "modules/worklet/WorkletGlobalScope.h"
+#include "platform/graphics/ImageBuffer.h"
 
 namespace blink {
 
+class CSSPaintDefinition;
+class CSSPaintImageGeneratorImpl;
+class ExceptionState;
+
 class PaintWorkletGlobalScope : public WorkletGlobalScope {
     DEFINE_WRAPPERTYPEINFO();
 public:
@@ -18,10 +23,22 @@ public:
     ~PaintWorkletGlobalScope() override;
 
     bool isPaintWorkletGlobalScope() const final { return true; }
-    void registerPaint(const String&, ScriptValue) { }
+    void registerPaint(const String& name, const ScriptValue& ctor, ExceptionState&);
+
+    CSSPaintDefinition* findDefinition(const String& name);
+    void addPendingGenerator(const String& name, PassRefPtrWillBeRawPtr<CSSPaintImageGeneratorImpl>);
+
+    DECLARE_VIRTUAL_TRACE();
 
 private:
     PaintWorkletGlobalScope(LocalFrame*, const KURL&, const String& userAgent, PassRefPtr<SecurityOrigin>, v8::Isolate*);
+
+    typedef WillBeHeapHashMap<String, RefPtrWillBeMember<CSSPaintDefinition>> DefinitionMap;
+    DefinitionMap m_paintDefinitions;
+
+    using GeneratorHashSet = WillBeHeapHashSet<WeakPtrWillBeWeakMember<CSSPaintImageGeneratorImpl>>;
+    using PendingGeneratorMap = WillBeHeapHashMap<String, OwnPtrWillBeMember<GeneratorHashSet>>;
+    PendingGeneratorMap m_pendingGenerators;
 };
 
 DEFINE_TYPE_CASTS(PaintWorkletGlobalScope, ExecutionContext, context, context->isPaintWorkletGlobalScope(), context.isPaintWorkletGlobalScope());