Add decode() functionality to image elements.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 3559 matching lines @@
 
 void WebViewImpl::hidePopups() {
   cancelPagePopup();
 }
 
 WebInputMethodControllerImpl* WebViewImpl::getActiveWebInputMethodController()
     const {
   return WebInputMethodControllerImpl::fromFrame(focusedLocalFrameInWidget());
 }
 
+void WebViewImpl::requestDecode(
+    sk_sp<SkImage> image,
+    std::unique_ptr<WTF::Function<void(bool)>> callback) {
+  m_layerTreeView->requestDecode(std::move(image),
+                                 convertToBaseCallback(std::move(callback)));
+}
+
 Color WebViewImpl::baseBackgroundColor() const {
   return m_baseBackgroundColorOverrideEnabled ? m_baseBackgroundColorOverride
                                               : m_baseBackgroundColor;
 }
 
 void WebViewImpl::setBaseBackgroundColor(WebColor color) {
   if (m_baseBackgroundColor == color)
     return;
 
   m_baseBackgroundColor = color;
@@ skipping 636 matching lines @@
   if (focusedFrame->localFrameRoot() != mainFrameImpl()->frame())
     return nullptr;
   return focusedFrame;
 }
 
 LocalFrame* WebViewImpl::focusedLocalFrameAvailableForIme() const {
   return m_imeAcceptEvents ? focusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink