Split up ios/web:test_support.

ios/chrome/browser/web/BUILD.gn

Index: ios/chrome/browser/web/BUILD.gn
diff --git a/ios/chrome/browser/web/BUILD.gn b/ios/chrome/browser/web/BUILD.gn
index a947c052d9fc5681402bf6cb0ea0dae746204b50..6653256cbf71bf9dcabfe59ccce1890289c115df 100644
--- a/ios/chrome/browser/web/BUILD.gn
+++ b/ios/chrome/browser/web/BUILD.gn
@@ -73,8 +73,9 @@ source_set("unit_tests") {
     "//ios/chrome/browser/ui:ui",
     "//ios/chrome/browser/ui/sad_tab",
     "//ios/chrome/test:test_support",
-    "//ios/web:test_support",
     "//ios/web:web_arc",
+    "//ios/web/public/test:test_support",
+    "//ios/web/public/test/fakes:test_support",
     "//testing/gtest",
     "//ui/base:base",
     "//url:url",
@@ -258,7 +259,7 @@ source_set("test_support") {
     "//ios/chrome/browser/ui:ui_internal",
     "//ios/chrome/browser/web",
     "//ios/web",
-    "//ios/web:test_support",
+    "//ios/web/public/test:test_support",
   ]
 }
 
@@ -285,7 +286,8 @@ source_set("unit_tests_internal") {
     "//ios/chrome/browser/infobars",
     "//ios/chrome/browser/ui",
     "//ios/web",
-    "//ios/web:test_support",
+    "//ios/web/public/test:test_support",
+    "//ios/web/public/test/fakes:test_support",
     "//net",
     "//testing/gtest",
     "//third_party/ocmock",
@@ -331,7 +333,8 @@ source_set("eg_tests") {
     "//ios/third_party/earl_grey",
     "//ios/third_party/material_components_ios",
     "//ios/web:earl_grey_test_support",
-    "//ios/web:test_support",
+    "//ios/web/public/test:test_support",
+    "//ios/web/public/test/response_providers:test_support",
     "//net",
     "//ui/base",
     "//url",
@@ -352,7 +355,8 @@ source_set("perf_tests") {
     "//base",
     "//ios/chrome/test/base:perf_test_support",
     "//ios/web",
-    "//ios/web:test_support",
+    "//ios/web/public/test:test_support",
+    "//ios/web/public/test/fakes:test_support",
   ]
   libs = [ "WebKit.framework" ]
 }