Make task_manager_resource_providers.cc compile on POSIX.

base/process_util_posix.cc

Index: base/process_util_posix.cc
diff --git a/base/process_util_posix.cc b/base/process_util_posix.cc
index 2e3fd554a1db9a9acba5d6988022b02c9fd65f56..5dad52acd9a92f91185e0bb85f92b43dc537f019 100644
--- a/base/process_util_posix.cc
+++ b/base/process_util_posix.cc
@@ -43,6 +43,12 @@ bool OpenProcessHandle(ProcessId pid, ProcessHandle* handle) {
   return true;
 }
 
+bool OpenPrivilegedProcessHandle(ProcessId pid, ProcessHandle* handle) {
+  // On POSIX permissions are checked for each operation on process,
+  // not when opening a "handle".
+  return OpenProcessHandle(pid, handle);
+}
+
 void CloseProcessHandle(ProcessHandle process) {
   // See OpenProcessHandle, nothing to do.
   return;