DEPS rule to restrict ui/views dependencies in c/b/ui/cocoa

chrome/browser/ui/cocoa/DEPS

Index: chrome/browser/ui/cocoa/DEPS
diff --git a/chrome/browser/ui/cocoa/DEPS b/chrome/browser/ui/cocoa/DEPS
index 2fedb51bea63abeec57b6b54e5a8434d5cc990a0..c536acc9c8e6e5b687d01f4810e35db018531137 100644
--- a/chrome/browser/ui/cocoa/DEPS
+++ b/chrome/browser/ui/cocoa/DEPS
@@ -2,4 +2,18 @@ include_rules = [
   "+third_party/apple_sample_code",  # Apple code ImageAndTextCell.
   "+third_party/molokocacao",  # For NSBezierPath additions.
   "+third_party/ocmock",  # For unit tests.
+  # Tooklit-views dependencies shouldn't be introduced here except for special
+  # cases below.
+  "-ui/views",
 ]
+
+specific_include_rules = {
+  # Allow access to toolkit-views for specific bridging classes to integrate
+  # with a Cocoa browser window. These need to have "_views" somewhere in the
+  # file name. Mac-specific toolkit-views code that doesn't need to interact
+  # with a Cocoa browser should go under chrome/browser/ui/views.
+  ".*(_views).*\.(cc|h|mm)$": [
+    "+chrome/browser/ui/views",
+    "+ui/views",
+  ],
+}