Implement a paint offset cache for slimming paint v2

Source/core/paint/EmbeddedObjectPainter.cpp

 // 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 "core/paint/EmbeddedObjectPainter.h"
 
 #include "core/frame/Settings.h"
 #include "core/layout/LayoutEmbeddedObject.h"
 #include "core/layout/LayoutTheme.h"
@@ skipping 26 matching lines @@
 
 void EmbeddedObjectPainter::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     if (!m_layoutEmbeddedObject.showsUnavailablePluginIndicator())
         return;
 
     if (paintInfo.phase == PaintPhaseSelection)
         return;
 
     GraphicsContext* context = paintInfo.context;
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*context, m_layoutEmbeddedObject, paintInfo.phase))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*context, m_layoutEmbeddedObject, paintInfo.phase, paintOffset))
         return;
 
     FloatRect contentRect(m_layoutEmbeddedObject.contentBoxRect());
     contentRect.moveBy(roundedIntPoint(paintOffset));
-    LayoutObjectDrawingRecorder drawingRecorder(*context, m_layoutEmbeddedObject, paintInfo.phase, contentRect);
+    LayoutObjectDrawingRecorder drawingRecorder(*context, m_layoutEmbeddedObject, paintInfo.phase, contentRect, paintOffset);
     GraphicsContextStateSaver stateSaver(*context);
     // TODO(chrishtr): this should be pixel-snapped.
     context->clip(contentRect);
 
     Font font = replacementTextFont();
     // TODO(trchen): Speculative fix for crbug.com/481880
     // With last resort font, how could this ever be null?
     ASSERT(font.primaryFont());
     if (!font.primaryFont())
         return;
     TextRun textRun(m_layoutEmbeddedObject.unavailablePluginReplacementText());
     FloatSize textGeometry(font.width(textRun), font.fontMetrics().height());
 
     FloatRect backgroundRect(0, 0, textGeometry.width() + 2 * replacementTextRoundedRectLeftRightTextMargin, replacementTextRoundedRectHeight);
     backgroundRect.move(contentRect.center() - backgroundRect.center());
     Path roundedBackgroundRect;
     roundedBackgroundRect.addRoundedRect(backgroundRect, FloatSize(replacementTextRoundedRectRadius, replacementTextRoundedRectRadius));
     context->setFillColor(scaleAlpha(Color::white, replacementTextRoundedRectOpacity));
     context->fillPath(roundedBackgroundRect);
 
     FloatRect textRect(FloatPoint(), textGeometry);
     textRect.move(contentRect.center() - textRect.center());
     TextRunPaintInfo runInfo(textRun);
     runInfo.bounds = backgroundRect;
     context->setFillColor(scaleAlpha(Color::black, replacementTextTextOpacity));
     context->drawBidiText(font, runInfo, textRect.location() + FloatSize(0, font.fontMetrics().ascent()));
 }
 
 } // namespace blink