NetworkPkg: Update HttpDxe driver to consume EFI_HTTP_UTILITIES_PROTOCOL

v2:
* Register a notification function to be executed for Http utilities protocol
in the drivers entry points.

Since we add EFI_HTTP_UTILITIES_PROTOCOL support, HttpDxe driver should
be updated to remove internal http utilities functions and consume this
protocol directly.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
Cc: Samer El-Haj-Mahmoud <elhaj@hp.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18316 6f19259b-4bc3-4df7-8a09-765794883524

NetworkPkg/HttpDxe/HttpDriver.c

@@ -15,6 +15,8 @@
 
 #include "HttpDriver.h"
 
+EFI_HTTP_UTILITIES_PROTOCOL *mHttpUtilities = NULL;
+
 ///
 /// Driver Binding Protocol instance
 ///
@@ -100,6 +102,35 @@ HttpCleanService (
   }
 }
 
+/**
+  The event process routine when the http utilities protocol is installed
+  in the system.
+
+  @param[in]     Event         Not used.
+  @param[in]     Context       The pointer to the IP4 config2 instance data.
+
+**/
+VOID
+EFIAPI
+HttpUtilitiesInstalledCallback (
+  IN EFI_EVENT  Event,
+  IN VOID       *Context
+  )
+{
+  gBS->LocateProtocol (
+         &gEfiHttpUtilitiesProtocolGuid, 
+         NULL, 
+         (VOID **) &mHttpUtilities
+         );
+		 
+  //
+  // Close the event if Http utilities protocol is loacted.
+  //
+  if (mHttpUtilities != NULL && Event != NULL) {
+     gBS->CloseEvent (Event);
+  }
+}
+
 /**
   This is the declaration of an EFI image entry point. This entry point is
   the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
@@ -118,7 +149,28 @@ HttpDxeDriverEntryPoint (
   IN EFI_HANDLE        ImageHandle,
   IN EFI_SYSTEM_TABLE  *SystemTable
   )
-{
+{ 
+  VOID           *Registration;
+
+  gBS->LocateProtocol (
+         &gEfiHttpUtilitiesProtocolGuid, 
+         NULL, 
+         (VOID **) &mHttpUtilities
+         );
+
+  if (mHttpUtilities == NULL) {
+    //
+    // No Http utilities protocol, register a notify.
+    //
+    EfiCreateProtocolNotifyEvent (
+      &gEfiHttpUtilitiesProtocolGuid,
+      TPL_CALLBACK,
+      HttpUtilitiesInstalledCallback,
+      NULL,
+      &Registration
+      );
+  }
+
   //
   // Install UEFI Driver Model protocol(s).
   //