Convert printing IPCs to Mojo

chrome/service/service_utility_process_host.h

Index: chrome/service/service_utility_process_host.h
diff --git a/chrome/service/service_utility_process_host.h b/chrome/service/service_utility_process_host.h
index d0dea943390b3ed589ba630b6f10b157eb11a85b..d1c0438595af32667cc26396dc3f75839c0401b9 100644
--- a/chrome/service/service_utility_process_host.h
+++ b/chrome/service/service_utility_process_host.h
@@ -11,6 +11,7 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "components/printing/common/printing.mojom.h"
 #include "content/public/common/child_process_host_delegate.h"
 #include "ipc/ipc_platform_file.h"
 
@@ -106,8 +107,6 @@ class ServiceUtilityProcessHost : public content::ChildProcessHostDelegate {
   bool StartGetPrinterSemanticCapsAndDefaults(const std::string& printer_name);
 
  protected:
-  bool Send(IPC::Message* msg);
-
   // Allows this method to be overridden for tests.
   virtual base::FilePath GetUtilityProcessCmd();
 
@@ -131,15 +130,14 @@ class ServiceUtilityProcessHost : public content::ChildProcessHostDelegate {
   // Messages handlers:
   void OnRenderPDFPagesToMetafilesPageCount(int page_count);
   void OnRenderPDFPagesToMetafilesPageDone(bool success, float scale_factor);
-  void OnGetPrinterCapsAndDefaultsSucceeded(
+  void OnGetPrinterCapsAndDefaults(
       const std::string& printer_name,
-      const printing::PrinterCapsAndDefaults& caps_and_defaults);
-  void OnGetPrinterCapsAndDefaultsFailed(const std::string& printer_name);
-  void OnGetPrinterSemanticCapsAndDefaultsSucceeded(
+      const base::Optional<printing::PrinterCapsAndDefaults>&
+          caps_and_defaults);
+  void OnGetPrinterSemanticCapsAndDefaults(
       const std::string& printer_name,
-      const printing::PrinterSemanticCapsAndDefaults& caps_and_defaults);
-  void OnGetPrinterSemanticCapsAndDefaultsFailed(
-      const std::string& printer_name);
+      const base::Optional<printing::PrinterSemanticCapsAndDefaults>&
+          caps_and_defaults);
 
   std::unique_ptr<content::ChildProcessHost> child_process_host_;
   base::Process process_;
@@ -155,6 +153,9 @@ class ServiceUtilityProcessHost : public content::ChildProcessHostDelegate {
   class PdfToEmfState;
   std::unique_ptr<PdfToEmfState> pdf_to_emf_state_;
 
+  printing::mojom::Printing* printing();
+  printing::mojom::PrintingPtr printing_;
+
   base::WeakPtrFactory<ServiceUtilityProcessHost> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceUtilityProcessHost);