Inlined a GetLocalState() method

The GetLocalState() method in cryptauth clashes with another
GetLocalState() in jumbo builds, and since there is only one
caller off this one, it might as well be inlined.

Bug: 746957
Change-Id: I63e33c5c94930cd0dfeaa27c1421ce81c9865feb
Reviewed-on: https://chromium-review.googlesource.com/873922Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#530357}

chrome/browser/cryptauth/chrome_cryptauth_service.cc

@@ -44,12 +44,10 @@
 
 namespace {
 
-PrefService* GetLocalState() {
-  return g_browser_process ? g_browser_process->local_state() : nullptr;
-}
-
 std::string GetDeviceId() {
-  PrefService* local_state = GetLocalState();
+  PrefService* local_state =
+      g_browser_process ? g_browser_process->local_state() : nullptr;
+
   if (!local_state)
     return std::string();