Call the client hints factory "client hints factory".

Jumbo builds failed when several files claimed to define
the g_previews_service_factory.

Change-Id: Id16f0c0c66da9fdb7c0d42afda611d672ab6da14
Reviewed-on: https://chromium-review.googlesource.com/c/1377441
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#616722}
diff --git a/chrome/browser/client_hints/client_hints_factory.cc b/chrome/browser/client_hints/client_hints_factory.cc
index 3a091c4..b6eae35 100644
--- a/chrome/browser/client_hints/client_hints_factory.cc
+++ b/chrome/browser/client_hints/client_hints_factory.cc
@@ -12,7 +12,7 @@
 namespace {
 
 base::LazyInstance<ClientHintsFactory>::DestructorAtExit
-    g_previews_service_factory = LAZY_INSTANCE_INITIALIZER;
+    g_client_hints_factory = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
@@ -25,7 +25,7 @@
 
 // static
 ClientHintsFactory* ClientHintsFactory::GetInstance() {
-  return g_previews_service_factory.Pointer();
+  return g_client_hints_factory.Pointer();
 }
 
 ClientHintsFactory::ClientHintsFactory()