Move OpenProcessHandle to Process::Open.

This removes another source of raw process handles.

BUG=417532

Review URL: https://codereview.chromium.org/868543002

Cr-Commit-Position: refs/heads/master@{#314633}
diff --git a/base/process/process_win.cc b/base/process/process_win.cc
index 0107015..4e600f94 100644
--- a/base/process/process_win.cc
+++ b/base/process/process_win.cc
@@ -47,10 +47,14 @@
 }
 
 // static
+Process Process::Open(ProcessId pid) {
+  return Process(::OpenProcess(kBasicProcessAccess, FALSE, pid));
+}
+
+// static
 Process Process::OpenWithExtraPriviles(ProcessId pid) {
   DWORD access = kBasicProcessAccess | PROCESS_DUP_HANDLE | PROCESS_VM_READ;
-  ProcessHandle handle = ::OpenProcess(access, FALSE, pid);
-  return Process(handle);
+  return Process(::OpenProcess(access, FALSE, pid));
 }
 
 // static