Revert "Create errors (especially cancellation errors) internally to WebCore, rather"

Source/core/page/ContextMenuController.cpp

Index: Source/core/page/ContextMenuController.cpp
diff --git a/Source/core/page/ContextMenuController.cpp b/Source/core/page/ContextMenuController.cpp
index 6010a9f855afdc0f3a595486704c09a97d20244c..6d3dc1b5856b5b1ddab668601ab6c4e7a2744664 100644
--- a/Source/core/page/ContextMenuController.cpp
+++ b/Source/core/page/ContextMenuController.cpp
@@ -544,9 +544,11 @@ void ContextMenuController::populate()
         FrameLoader* loader = frame->loader();
         KURL linkURL = m_hitTestResult.absoluteLinkURL();
         if (!linkURL.isEmpty()) {
-            appendItem(OpenLinkItem, m_contextMenu.get());
-            appendItem(OpenLinkInNewWindowItem, m_contextMenu.get());
-            appendItem(DownloadFileItem, m_contextMenu.get());
+            if (loader->client()->canHandleRequest(ResourceRequest(linkURL))) {
+                appendItem(OpenLinkItem, m_contextMenu.get());
+                appendItem(OpenLinkInNewWindowItem, m_contextMenu.get());
+                appendItem(DownloadFileItem, m_contextMenu.get());
+            }
             appendItem(CopyLinkItem, m_contextMenu.get());
         }
 
@@ -659,11 +661,14 @@ void ContextMenuController::populate()
             }
         }
 
+        FrameLoader* loader = frame->loader();
         KURL linkURL = m_hitTestResult.absoluteLinkURL();
         if (!linkURL.isEmpty()) {
-            appendItem(OpenLinkItem, m_contextMenu.get());
-            appendItem(OpenLinkInNewWindowItem, m_contextMenu.get());
-            appendItem(DownloadFileItem, m_contextMenu.get());
+            if (loader->client()->canHandleRequest(ResourceRequest(linkURL))) {
+                appendItem(OpenLinkItem, m_contextMenu.get());
+                appendItem(OpenLinkInNewWindowItem, m_contextMenu.get());
+                appendItem(DownloadFileItem, m_contextMenu.get());
+            }
             appendItem(CopyLinkItem, m_contextMenu.get());
             appendItem(*separatorItem(), m_contextMenu.get());
         }