Cleanup some dead code in blink::ImageBuffer and friends

third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp

 /*
  * Copyright (c) 2010, Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 858 matching lines @@
         m_context->bindFramebuffer(target, m_multisampleFBO ? m_multisampleFBO : m_fbo);
     else
         m_context->bindFramebuffer(target, m_fbo);
 }
 
 void DrawingBuffer::setPackAlignment(GLint param)
 {
     m_packAlignment = param;
 }
 
-void DrawingBuffer::paintRenderingResultsToCanvas(ImageBuffer* imageBuffer)
-{
-    paintFramebufferToCanvas(framebuffer(), size().width(), size().height(), !m_actualAttributes.premultipliedAlpha, imageBuffer);
-}
-
 bool DrawingBuffer::paintRenderingResultsToImageData(int& width, int& height, SourceDrawingBuffer sourceBuffer, WTF::ArrayBufferContents& contents)
 {
     ASSERT(!m_actualAttributes.premultipliedAlpha);
     width = size().width();
     height = size().height();
 
     Checked<int, RecordOverflow> dataSize = 4;
     dataSize *= width;
     dataSize *= height;
     if (dataSize.hasOverflowed())
@@ skipping 17 matching lines @@
         m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
         m_context->deleteFramebuffer(fbo);
     }
 
     restoreFramebufferBindings();
 
     pixels.transfer(contents);
     return true;
 }
 
-void DrawingBuffer::paintFramebufferToCanvas(int framebuffer, int width, int height, bool premultiplyAlpha, ImageBuffer* imageBuffer)
-{
-    unsigned char* pixels = 0;
-
-    const SkBitmap& canvasBitmap = imageBuffer->deprecatedBitmapForOverwrite();
-    const SkBitmap* readbackBitmap = 0;
-    ASSERT(canvasBitmap.colorType() == kN32_SkColorType);
-    if (canvasBitmap.width() == width && canvasBitmap.height() == height) {
-        // This is the fastest and most common case. We read back
-        // directly into the canvas's backing store.
-        readbackBitmap = &canvasBitmap;
-        m_resizingBitmap.reset();
-    } else {
-        // We need to allocate a temporary bitmap for reading back the
-        // pixel data. We will then use Skia to rescale this bitmap to
-        // the size of the canvas's backing store.
-        if (m_resizingBitmap.width() != width || m_resizingBitmap.height() != height) {
-            if (!m_resizingBitmap.tryAllocN32Pixels(width, height))
-                return;
-        }
-        readbackBitmap = &m_resizingBitmap;
-    }
-
-    // Read back the frame buffer.
-    SkAutoLockPixels bitmapLock(*readbackBitmap);
-    pixels = static_cast<unsigned char*>(readbackBitmap->getPixels());
-
-    m_context->bindFramebuffer(GL_FRAMEBUFFER, framebuffer);
-    readBackFramebuffer(pixels, width, height, ReadbackSkia, premultiplyAlpha ? WebGLImageConversion::AlphaDoPremultiply : WebGLImageConversion::AlphaDoNothing);
-    flipVertically(pixels, width, height);
-
-    readbackBitmap->notifyPixelsChanged();
-    if (m_resizingBitmap.readyToDraw()) {
-        // We need to draw the resizing bitmap into the canvas's backing store.
-        SkCanvas canvas(canvasBitmap);
-        canvas.drawBitmapRect(m_resizingBitmap, SkRect::MakeIWH(canvasBitmap.width(), canvasBitmap.height()), nullptr);
-    }
-}
-
 void DrawingBuffer::readBackFramebuffer(unsigned char* pixels, int width, int height, ReadbackOrder readbackOrder, WebGLImageConversion::AlphaOp op)
 {
     if (m_packAlignment > 4)
         m_context->pixelStorei(GL_PACK_ALIGNMENT, 1);
     m_context->readPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
     if (m_packAlignment > 4)
         m_context->pixelStorei(GL_PACK_ALIGNMENT, m_packAlignment);
 
     size_t bufferSize = 4 * width * height;
 
@@ skipping 57 matching lines @@
 void DrawingBuffer::deleteChromiumImageForTexture(TextureInfo* info)
 {
     if (info->imageId) {
         m_context->releaseTexImage2DCHROMIUM(GL_TEXTURE_2D, info->imageId);
         m_context->destroyImageCHROMIUM(info->imageId);
         info->imageId = 0;
     }
 }
 
 } // namespace blink