Add a convenience typedef LazyInstance<T>::Leaky to avoid repeating T.

Converted the first 20 or so hits for LeakyLazyInstanceTraits on codesearch to
demonstrate the benefit at callsites.  The real change is base/lazy_instance.h;
everything else is example.

BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/9192024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@118754 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ui/gfx/gl/gl_surface.cc b/ui/gfx/gl/gl_surface.cc
index 43471857..858fb93b 100644
--- a/ui/gfx/gl/gl_surface.cc
+++ b/ui/gfx/gl/gl_surface.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -17,10 +17,8 @@
 namespace gfx {
 
 namespace {
-base::LazyInstance<
-    base::ThreadLocalPointer<GLSurface>,
-    base::LeakyLazyInstanceTraits<base::ThreadLocalPointer<GLSurface> > >
-        current_surface_ = LAZY_INSTANCE_INITIALIZER;
+base::LazyInstance<base::ThreadLocalPointer<GLSurface> >::Leaky
+    current_surface_ = LAZY_INSTANCE_INITIALIZER;
 }  // namespace
 
 // static