[ios] Makes IOSChromeUnitTestSuite inherit from web::WebTestSuite.

ios/chrome/test/BUILD.gn

Index: ios/chrome/test/BUILD.gn
diff --git a/ios/chrome/test/BUILD.gn b/ios/chrome/test/BUILD.gn
index 885d6e01f2958006e7bf337678fb7c76c6d0b2a3..4a6da67f0d9308525f96fc88be2a60ed658e04c5 100644
--- a/ios/chrome/test/BUILD.gn
+++ b/ios/chrome/test/BUILD.gn
@@ -20,6 +20,7 @@ source_set("test_support") {
   deps = [
     "//base",
     "//base/test:test_support",

[sdefresne, 2016/11/07 09:01:38]

Is this dependency still required?

[rohitrao (ping after 24h), 2016/11/07 12:49:51]

"gn check" says no.  Removed.

+    "//components/content_settings/core/common",
     "//components/network_time",
     "//components/prefs",
     "//components/prefs:test_support",
@@ -29,6 +30,7 @@ source_set("test_support") {
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser:test_support",
     "//ios/web",
+    "//ios/web:test_support",
     "//net",
     "//testing/gmock",
     "//testing/gtest",