Remove a bunch of dead code from RenderLayer

sky/engine/core/html/HTMLCanvasElement.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 139 matching lines @@
 
     // FIXME - The code depends on the context not going away once created, to prevent JS from
     // seeing a dangling pointer. So for now we will disallow the context from being changed
     // once it is created.
     if (type == "2d") {
         if (m_context && !m_context->is2d())
             return 0;
         if (!m_context) {
             blink::Platform::current()->histogramEnumeration("Canvas.ContextType", Context2d, ContextTypeCount);
             m_context = CanvasRenderingContext2D::create(this, static_cast<Canvas2DContextAttributes*>(attrs));
-            setNeedsCompositingUpdate();
         }
         return m_context.get();
     }
 
     // Accept the the provisional "experimental-webgl" or official "webgl" context ID.
     if (type == "webgl" || type == "experimental-webgl") {
         ContextType contextType = (type == "webgl") ? ContextWebgl : ContextExperimentalWebgl;
         if (!m_context) {
             blink::Platform::current()->histogramEnumeration("Canvas.ContextType", contextType, ContextTypeCount);
             m_context = WebGLRenderingContext::create(this, static_cast<WebGLContextAttributes*>(attrs));
-            setNeedsCompositingUpdate();
             updateExternallyAllocatedMemory();
         } else if (!m_context->is3d()) {
             dispatchEvent(WebGLContextEvent::create(EventTypeNames::webglcontextcreationerror, false, true, "Canvas has an existing, non-WebGL context"));
             return 0;
         }
         return m_context.get();
     }
 
     return 0;
 }
@@ skipping 96 matching lines @@
         return;
     }
 
     setSurfaceSize(newSize);
 
     if (m_context && m_context->is3d() && oldSize != size())
         toWebGLRenderingContext(m_context.get())->reshape(width(), height());
 
     if (RenderObject* renderer = this->renderer()) {
         if (renderer->isCanvas()) {
-            if (oldSize != size()) {
-                toRenderHTMLCanvas(renderer)->canvasSizeChanged();
-                if (renderBox() && renderBox()->hasAcceleratedCompositing())
-                    renderBox()->contentChanged(CanvasChanged);
-            }
             if (hadImageBuffer)
                 renderer->setShouldDoFullPaintInvalidation(true);
         }
     }
 
     HashSet<RawPtr<CanvasObserver> >::iterator end = m_observers.end();
     for (HashSet<RawPtr<CanvasObserver> >::iterator it = m_observers.begin(); it != end; ++it)
         (*it)->canvasResized(this);
 }
 
@@ skipping 215 matching lines @@
     if (!msaaSampleCount && document().settings() && !document().settings()->antialiased2dCanvasEnabled())
         m_imageBuffer->context()->setShouldAntialias(false);
     // GraphicsContext's defaults don't always agree with the 2d canvas spec.
     // See CanvasRenderingContext2D::State::State() for more information.
     m_imageBuffer->context()->setMiterLimit(10);
     m_imageBuffer->context()->setStrokeThickness(1);
 #if ENABLE(ASSERT)
     m_imageBuffer->context()->disableDestructionChecks(); // 2D canvas is allowed to leave context in an unfinalized state.
 #endif
     m_contextStateSaver = adoptPtr(new GraphicsContextStateSaver(*m_imageBuffer->context()));
-
-    if (m_context)
-        setNeedsCompositingUpdate();
 }
 
 void HTMLCanvasElement::notifySurfaceInvalid()
 {
     if (m_context && m_context->is2d()) {
         CanvasRenderingContext2D* context2d = toCanvasRenderingContext2D(m_context.get());
         context2d->loseContext();
     }
 }
 
@@ skipping 133 matching lines @@
     }
     return m_imageBuffer->copyImage(DontCopyBackingStore, Unscaled);
 }
 
 FloatSize HTMLCanvasElement::sourceSize() const
 {
     return FloatSize(width(), height());
 }
 
 }