Move IIDs of the new updater COM interfaces to BUILD.gn

Move UUID definitions of the ICompleteStatus and IUpdaterObserver to the
BUILD.gn file so it can be customized by adopters.

Change-Id: Ia265adba9853cbfc1c6c34d1bba73b54e2fa2c6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2111278
Auto-Submit: Maciek Kumorek <makumo@microsoft.com>
Reviewed-by: Sorin Jianu <sorin@chromium.org>
Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Maciek Kumorek <makumo@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#752044}

chrome/updater/server/win/BUILD.gn

@@ -7,6 +7,8 @@ import("//build/toolchain/win/midl.gni")
 midl("updater_idl_idl") {
   sources = [ "updater_idl.idl" ]
   defines = [
+    "ICOMPLETESTATUS_IID=2FCD14AF-B645-4351-8359-E80A0E202A0B",
+    "IUPDATEROBSERVER_IID=7B416CFD-4216-4FD6-BD83-7C586054676E",
     "IUPDATER_IID=63B8FFB1-5314-48C9-9C57-93EC8BC6184B",
     "UPDATER_LIB_UUID=69464FF0-D9EC-4037-A35F-8AE4358106CC",
     "UPDATER_CLSID=158428A4-6014-4978-83BA-9FAD0DABE791",

chrome/updater/server/win/updater_idl.idl

@@ -8,7 +8,7 @@ import "ocidl.idl";
 [
   object,
   dual,
-  uuid(2FCD14AF-B645-4351-8359-E80A0E202A0B),
+  uuid(ICOMPLETESTATUS_IID),
   helpstring("ICompleteStatus Interface"),
   pointer_default(unique)
 ]
@@ -20,7 +20,7 @@ interface ICompleteStatus : IUnknown {
 [
   object,
   oleautomation,
-  uuid(7B416CFD-4216-4FD6-BD83-7C586054676E),
+  uuid(IUPDATEROBSERVER_IID),
   helpstring("IUpdaterObserver Interface"),
   pointer_default(unique)
 ]