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 fde3271c895d1e1da9767984f818d3b535279019..fb872d7f6c1a466584463e2e937adf31e5563b6f 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -957,6 +957,15 @@ WebLocalFrameBase* ChromeClientImpl::GetWebLocalFrameBase(LocalFrame* frame) {
   return WebLocalFrameImpl::FromFrame(frame);
 }
 
+void ChromeClientImpl::RequestDecode(
+    LocalFrame* frame,
+    sk_sp<SkImage> image,
+    std::unique_ptr<WTF::Function<void(bool)>> callback) {
+  WebLocalFrameImpl* web_frame = WebLocalFrameImpl::FromFrame(frame);
+  web_frame->LocalRoot()->FrameWidget()->RequestDecode(std::move(image),
+                                                       std::move(callback));
+}
+
 void ChromeClientImpl::SetEventListenerProperties(
     LocalFrame* frame,
     WebEventListenerClass event_class,