Remove a bunch of dead code from RenderLayer

sky/engine/core/html/canvas/WebGLRenderingContextBase.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 766 matching lines @@
     if (m_framebufferBinding || isContextLost())
         return;
 
     drawingBuffer()->markContentsChanged();
 
     m_layerCleared = false;
     RenderBox* renderBox = canvas()->renderBox();
     if (renderBox && renderBox->hasAcceleratedCompositing()) {
         m_markedCanvasDirty = true;
         canvas()->clearCopiedImage();
-        renderBox->contentChanged(changeType);
     } else {
         if (!m_markedCanvasDirty) {
             m_markedCanvasDirty = true;
             canvas()->didDraw(FloatRect(FloatPoint(0, 0), clampedCanvasSize()));
         }
     }
 }
 
 bool WebGLRenderingContextBase::clearIfComposited(GLbitfield mask)
 {
@@ skipping 144 matching lines @@
     GLint maxSize = std::min(m_maxTextureSize, m_maxRenderbufferSize);
     // Limit drawing buffer size to 4k to avoid memory exhaustion.
     const int sizeUpperLimit = 4096;
     maxSize = std::min(maxSize, sizeUpperLimit);
     GLint maxWidth = std::min(maxSize, m_maxViewportDims[0]);
     GLint maxHeight = std::min(maxSize, m_maxViewportDims[1]);
     width = clamp(width, 1, maxWidth);
     height = clamp(height, 1, maxHeight);
 
     if (m_needsUpdate) {
-        RenderBox* renderBox = canvas()->renderBox();
-        if (renderBox && renderBox->hasAcceleratedCompositing())
-            renderBox->contentChanged(CanvasChanged);
+        // FIXME(sky): This seems wrong.
         m_needsUpdate = false;
     }
 
     // We don't have to mark the canvas as dirty, since the newly created image buffer will also start off
     // clear (and this matches what reshape will do).
     drawingBuffer()->reset(IntSize(width, height));
     restoreStateAfterClear();
 
     webContext()->bindTexture(GL_TEXTURE_2D, objectOrZero(m_textureUnits[m_activeTextureUnit].m_texture2DBinding.get()));
     webContext()->bindRenderbuffer(GL_RENDERBUFFER, objectOrZero(m_renderbufferBinding.get()));
@@ skipping 4648 matching lines @@
     return m_sharedWebGraphicsContext3D ? m_sharedWebGraphicsContext3D->drawingBuffer() : 0;
 }
 #else
 DrawingBuffer* WebGLRenderingContextBase::drawingBuffer() const
 {
     return m_drawingBuffer.get();
 }
 #endif
 
 } // namespace blink