Printing: Disable subframes when printing a selection.

components/printing/renderer/print_web_view_helper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/printing/renderer/print_web_view_helper.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 821 matching lines @@
 }
 
 blink::WebLocalFrame* PrepareFrameAndViewForPrint::CreateChildFrame(
     blink::WebLocalFrame* parent,
     blink::WebTreeScopeType scope,
     const blink::WebString& name,
     const blink::WebString& fallback_name,
     blink::WebSandboxFlags sandbox_flags,
     const blink::WebParsedFeaturePolicy& container_policy,
     const blink::WebFrameOwnerProperties& frame_owner_properties) {
-  blink::WebLocalFrame* frame =
-      parent->CreateLocalChild(scope, this, nullptr, nullptr);
-  return frame;
+  // This is called when printing a selection and when this selection contains
+  // an iframe. This is not supported yet. An empty rectangle will be displayed
+  // instead.
+  // Please see: https://crbug.com/732780.
+  return nullptr;
 }
 
 std::unique_ptr<blink::WebURLLoader>
 PrepareFrameAndViewForPrint::CreateURLLoader() {
   // TODO(yhirano): Stop using Platform::CreateURLLoader() here.
   return blink::Platform::Current()->CreateURLLoader();
 }
 
 void PrepareFrameAndViewForPrint::CallOnReady() {
   return on_ready_.Run();  // Can delete |this|.
@@ skipping 1524 matching lines @@
       blink::WebConsoleMessage::kLevelWarning, message));
   return false;
 }
 
 void PrintWebViewHelper::ScriptingThrottler::Reset() {
   // Reset counter on successful print.
   count_ = 0;
 }
 
 }  // namespace printing