Split up ios/web:test_support.

ios/chrome/browser/ui/history/BUILD.gn

Index: ios/chrome/browser/ui/history/BUILD.gn
diff --git a/ios/chrome/browser/ui/history/BUILD.gn b/ios/chrome/browser/ui/history/BUILD.gn
index 373847d6819a31a84513818fb3efa0725a57a290..db6baae03236d7ad8f0963c821c243dfff0d31b8 100644
--- a/ios/chrome/browser/ui/history/BUILD.gn
+++ b/ios/chrome/browser/ui/history/BUILD.gn
@@ -125,7 +125,7 @@ source_set("unit_tests") {
     "//ios/chrome/common",
     "//ios/chrome/test:test_support",
     "//ios/web",
-    "//ios/web:test_support",
+    "//ios/web/public/test",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
@@ -174,7 +174,7 @@ source_set("unit_tests_arc") {
     "//ios/chrome/common",
     "//ios/chrome/test:test_support",
     "//ios/web",
-    "//ios/web:test_support",
+    "//ios/web/public/test",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
@@ -227,7 +227,8 @@ source_set("eg_tests") {
     "//ios/public/provider/chrome/browser/signin:test_support",
     "//ios/testing:ios_test_support",
     "//ios/third_party/earl_grey",
-    "//ios/web:test_support",
+    "//ios/web/public/test",
+    "//ios/web/public/test/http_server",
     "//net",
     "//ui/base",
   ]