Add decode() functionality to image elements.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

Index: third_party/WebKit/Source/web/ChromeClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.cpp b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
index cf15d6dd1d0e6dbf307d6ffaf2fd2589d005ffde..6571332a537d9a4569f1bcfc175619010c3ba43a 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -936,6 +936,12 @@ WebLayerTreeView* ChromeClientImpl::getWebLayerTreeView(LocalFrame* frame) {
   return webFrame->localRoot()->frameWidget()->getLayerTreeView();
 }
 
+void ChromeClientImpl::requestDecode(
+    sk_sp<SkImage> image,
+    std::unique_ptr<WTF::Function<void(bool)>> callback) {
+  m_webView->requestDecode(std::move(image), std::move(callback));
+}
+
 void ChromeClientImpl::setEventListenerProperties(
     LocalFrame* frame,
     WebEventListenerClass eventClass,