Add brotli content-encoding filter.

net/DEPS

Index: net/DEPS
diff --git a/net/DEPS b/net/DEPS
index 5f49c8048b52278cc8dc306a63c940833e02f10d..c7d795145666c7d0549f4da57cfd37299c96be17 100644
--- a/net/DEPS
+++ b/net/DEPS
@@ -11,9 +11,10 @@ include_rules = [
   "+sdch/open-vcdiff",
   "+v8",
 
-  # Most of net should not depend on icu, to keep size down when built as a
-  # library.
+  # Most of net should not depend on icu, and brotli to keep size down when
+  # built as a library.
   "-base/i18n",
+  "-third_party/brotli",
   "-third_party/icu",
 ]
 
@@ -56,6 +57,10 @@ specific_include_rules = {
   "run_all_unittests\.cc": [
     "+third_party/mojo/src/mojo/edk",
   ],
+
+  "brotli_filter\.cc": [
+    "+third_party/brotli",
+  ],
 }
 
 skip_child_includes = [