Revert of base: Remove operator& from ScopedAuthorizationRef. (patchset #1 id:1 of https://codereview.chromium.org/986563003/)

Reason for revert:
Breaks the official Mac bot:

../../remoting/host/installer/mac/uninstaller/remoting_uninstaller.mm:155:21:error: no matching function for call to 'AuthorizationCreate'
  OSStatus status = AuthorizationCreate(nullptr, kAuthorizationEmptyEnvironment,
                    ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/Security.framework/Headers/Authorization.h:253:10: note: candidate function not viable: no known conversion from 'base::mac::ScopedAuthorizationRef *' to 'AuthorizationRef *' (aka 'const AuthorizationOpaqueRef **') for 4th argument
OSStatus AuthorizationCreate(const AuthorizationRights *rights,

Original issue's description:
> base: Remove operator& from ScopedAuthorizationRef.
>
> The operator& is dangerous and makes it unclear what you are doing.
> Replace it with a get_pointer() method.
>
> R=Nico
> BUG=464816
>
> Committed: https://crrev.com/845755856c54aabac7022ee373618468b92f2e61
> Cr-Commit-Position: refs/heads/master@{#319565}

TBR=thakis@chromium.org,danakj@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=464816

Review URL: https://codereview.chromium.org/988113002

Cr-Commit-Position: refs/heads/master@{#319570}

2 files changed, 6 insertions, 3 deletions

diff --git a/base/mac/authorization_util.mm b/base/mac/authorization_util.mm
index 1dfd5a0..003c26d 100644
--- a/base/mac/authorization_util.mm
+++ b/base/mac/authorization_util.mm
@@ -28,9 +28,10 @@ AuthorizationRef GetAuthorizationRightsWithPrompt(
     AuthorizationFlags extraFlags) {
   // Create an empty AuthorizationRef.
   ScopedAuthorizationRef authorization;
-  OSStatus status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment,
+  OSStatus status = AuthorizationCreate(NULL,
+                                        kAuthorizationEmptyEnvironment,
                                         kAuthorizationFlagDefaults,
-                                        authorization.get_pointer());
+                                        &authorization);
   if (status != errAuthorizationSuccess) {
     OSSTATUS_LOG(ERROR, status) << "AuthorizationCreate";
     return NULL;
diff --git a/base/mac/scoped_authorizationref.h b/base/mac/scoped_authorizationref.h
index 1811488..6413f2e 100644
--- a/base/mac/scoped_authorizationref.h
+++ b/base/mac/scoped_authorizationref.h
@@ -49,7 +49,9 @@ class ScopedAuthorizationRef {
     return authorization_;
   }
 
-  AuthorizationRef* get_pointer() { return &authorization_; }
+  AuthorizationRef* operator&() {
+    return &authorization_;
+  }
 
   AuthorizationRef get() const {
     return authorization_;