fix: build failure when printing is disabled (#46286)

Co-authored-by: Charles Kerr <charles@charleskerr.com>

shell/browser/api/electron_api_web_contents.cc

@@ -2112,6 +2112,7 @@ void WebContents::DraggableRegionsChanged(
   draggable_region_ = DraggableRegionsToSkRegion(regions);
 }
 
+#if BUILDFLAG(ENABLE_PRINTING)
 void WebContents::PrintCrossProcessSubframe(
     content::WebContents* web_contents,
     const gfx::Rect& rect,
@@ -2122,6 +2123,7 @@ void WebContents::PrintCrossProcessSubframe(
     client->PrintCrossProcessSubframe(rect, document_cookie, subframe_host);
   }
 }
+#endif
 
 SkRegion* WebContents::draggable_region() {
   return g_disable_draggable_regions ? nullptr : draggable_region_.get();

shell/browser/api/electron_api_web_contents.h

@@ -636,11 +636,13 @@ class WebContents final : public ExclusiveAccessContext,
   void DraggableRegionsChanged(
       const std::vector<blink::mojom::DraggableRegionPtr>& regions,
       content::WebContents* contents) override;
+#if BUILDFLAG(ENABLE_PRINTING)
   void PrintCrossProcessSubframe(
       content::WebContents* web_contents,
       const gfx::Rect& rect,
       int document_cookie,
       content::RenderFrameHost* subframe_host) const override;
+#endif
 
   // content::WebContentsObserver:
   void BeforeUnloadFired(bool proceed) override;

shell/browser/feature_list.cc

@@ -15,6 +15,7 @@
 #include "electron/buildflags/buildflags.h"
 #include "media/base/media_switches.h"
 #include "net/base/features.h"
+#include "printing/buildflags/buildflags.h"
 #include "services/network/public/cpp/features.h"
 #include "third_party/blink/public/common/features.h"