[Mac] First part of Omnibox decoration refactor. Enable ev bubble.

chrome/browser/cocoa/location_bar/location_bar_decoration.mm

Index: chrome/browser/cocoa/location_bar/location_bar_decoration.mm
diff --git a/chrome/browser/cocoa/location_bar/location_bar_decoration.mm b/chrome/browser/cocoa/location_bar/location_bar_decoration.mm
new file mode 100644
index 0000000000000000000000000000000000000000..6d697404b9a627318b447fd43a3255609b0783cc
--- /dev/null
+++ b/chrome/browser/cocoa/location_bar/location_bar_decoration.mm
@@ -0,0 +1,18 @@
+// Copyright (c) 2010 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.
+
+#import "chrome/browser/cocoa/location_bar/location_bar_decoration.h"
+
+#include "base/logging.h"
+
+const CGFloat LocationBarDecoration::kOmittedWidth = 0.0;
+
+CGFloat LocationBarDecoration::GetWidthForSpace(CGFloat width) {
+  NOTREACHED();
+  return kOmittedWidth;
+}
+
+void LocationBarDecoration::DrawInFrame(NSRect frame, NSView* control_view) {
+  NOTREACHED();
+}