Add a FOUC painting test.

Source/web/tests/sim/SimCanvas.cpp

Index: Source/web/tests/sim/SimCanvas.cpp
diff --git a/Source/web/tests/sim/SimCanvas.cpp b/Source/web/tests/sim/SimCanvas.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..40ca1f80716ac6c46b70f142d612ed6c7b485e26
--- /dev/null
+++ b/Source/web/tests/sim/SimCanvas.cpp
@@ -0,0 +1,113 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#include "config.h"
+
+#include "web/tests/sim/SimCanvas.h"
+
+#include "third_party/skia/include/core/SkPaint.h"
+#include "third_party/skia/include/core/SkPath.h"
+#include "third_party/skia/include/core/SkRRect.h"
+#include "third_party/skia/include/core/SkRect.h"
+
+namespace blink {
+
+static int s_depth = 0;
+
+class DrawScope {
+public:
+    DrawScope() { ++s_depth; }
+    ~DrawScope() { --s_depth; }
+};
+
+SimCanvas::SimCanvas(int width, int height)
+    : SkCanvas(width, height)
+{
+}
+
+void SimCanvas::addCommand(CommandType type, RGBA32 color)
+{
+    if (s_depth > 1)
+        return;
+    Command command = {type, color};
+    m_commands.append(command);
+}
+
+void SimCanvas::onDrawRect(const SkRect& rect, const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Rect, paint.getColor());
+    SkCanvas::onDrawRect(rect, paint);
+}
+
+void SimCanvas::onDrawOval(const SkRect& oval, const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Shape, paint.getColor());
+    SkCanvas::onDrawOval(oval, paint);
+}
+
+void SimCanvas::onDrawRRect(const SkRRect& rrect, const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Shape, paint.getColor());
+    SkCanvas::onDrawRRect(rrect, paint);
+}
+
+void SimCanvas::onDrawPath(const SkPath& path, const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Shape, paint.getColor());
+    SkCanvas::onDrawPath(path, paint);
+}
+
+void SimCanvas::onDrawImage(const SkImage* image, SkScalar left, SkScalar top, const SkPaint* paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Image);
+    SkCanvas::onDrawImage(image, left, top, paint);
+}
+
+void SimCanvas::onDrawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst, const SkPaint* paint, SrcRectConstraint constraint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Image);
+    SkCanvas::onDrawImageRect(image, src, dst, paint, constraint);
+}
+
+void SimCanvas::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y, const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Text, paint.getColor());
+    SkCanvas::onDrawText(text, byteLength, x, y, paint);
+}
+
+void SimCanvas::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[], const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Text, paint.getColor());
+    SkCanvas::onDrawPosText(text, byteLength, pos, paint);
+}
+
+void SimCanvas::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[], SkScalar constY, const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Text, paint.getColor());
+    SkCanvas::onDrawPosTextH(text, byteLength, xpos, constY, paint);
+}
+
+void SimCanvas::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path, const SkMatrix* matrix, const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Text, paint.getColor());
+    SkCanvas::onDrawTextOnPath(text, byteLength, path, matrix, paint);
+}
+
+void SimCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, const SkPaint& paint)
+{
+    DrawScope scope;
+    addCommand(CommandType::Text, paint.getColor());
+    SkCanvas::onDrawTextBlob(blob, x, y, paint);
+}
+
+} // namespace blink