Convert utility process zip creator IPC to mojo

chrome/utility/chrome_content_utility_client.h

Index: chrome/utility/chrome_content_utility_client.h
diff --git a/chrome/utility/chrome_content_utility_client.h b/chrome/utility/chrome_content_utility_client.h
index f6de380d55ec47367a480d36de71fc3d4d976431..5aa5f0450351a40368bbfb318ecd50561ee72a58 100644
--- a/chrome/utility/chrome_content_utility_client.h
+++ b/chrome/utility/chrome_content_utility_client.h
@@ -5,13 +5,6 @@
 #ifndef CHROME_UTILITY_CHROME_CONTENT_UTILITY_CLIENT_H_
 #define CHROME_UTILITY_CHROME_CONTENT_UTILITY_CLIENT_H_
 
-#include <stdint.h>
-
-#include <memory>
-#include <set>
-#include <string>
-#include <vector>
-
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
@@ -19,11 +12,6 @@
 #include "content/public/utility/content_utility_client.h"
 #include "ipc/ipc_platform_file.h"
 
-namespace base {
-class FilePath;
-struct FileDescriptor;
-}
-
 class UtilityMessageHandler;
 
 class ChromeContentUtilityClient : public content::ContentUtilityClient {
@@ -31,6 +19,7 @@ class ChromeContentUtilityClient : public content::ContentUtilityClient {
   ChromeContentUtilityClient();
   ~ChromeContentUtilityClient() override;
 
+  // content::ContentUtilityClient:
   void UtilityThreadStarted() override;
   bool OnMessageReceived(const IPC::Message& message) override;
   void ExposeInterfacesToBrowser(
@@ -41,12 +30,6 @@ class ChromeContentUtilityClient : public content::ContentUtilityClient {
 
  private:
   // IPC message handlers.
-#if defined(OS_CHROMEOS)
-  void OnCreateZipFile(const base::FilePath& src_dir,
-                       const std::vector<base::FilePath>& src_relative_paths,
-                       const base::FileDescriptor& dest_fd);
-#endif  // defined(OS_CHROMEOS)
-
   void OnStartupPing();
 #if defined(FULL_SAFE_BROWSING)
   void OnAnalyzeZipFileForDownloadProtection(