Download web payment manifests.

components/payments/BUILD.gn

Index: components/payments/BUILD.gn
diff --git a/components/payments/BUILD.gn b/components/payments/BUILD.gn
index a0bff0681aeebdeb398d804437957ac2ce1c4e93..fa424985a7c1c716922faa525a193f150c44160f 100644
--- a/components/payments/BUILD.gn
+++ b/components/payments/BUILD.gn
@@ -42,7 +42,7 @@ if (!is_ios) {
 
     deps = [
       ":payment_request",
-      ":payment_validation",
+      ":payment_utils",
       "//components/autofill/core/browser",
       "//content/public/browser",
       "//mojo/public/cpp/bindings",
@@ -50,12 +50,14 @@ if (!is_ios) {
   }
 }
 
-static_library("payment_validation") {
+static_library("payment_utils") {
   sources = [
     "currency_formatter.cc",
     "currency_formatter.h",
     "payment_details_validation.cc",
     "payment_details_validation.h",
+    "payment_manifest_downloader.cc",
+    "payment_manifest_downloader.h",
     "payments_validators.cc",
     "payments_validators.h",
   ]
@@ -63,6 +65,8 @@ static_library("payment_validation") {
   deps = [
     ":payment_request",
     "//base",
+    "//components/link_header_util",
+    "//net",
     "//third_party/re2:re2",
     "//url:url",
   ]
@@ -76,12 +80,14 @@ source_set("unit_tests") {
   testonly = true
   sources = [
     "currency_formatter_unittest.cc",
+    "payment_manifest_downloader_test.cc",
     "payments_validators_test.cc",
   ]
 
   deps = [
-    ":payment_validation",
+    ":payment_utils",
     "//base",
+    "//testing/gmock",
     "//testing/gtest",
     "//third_party/icu:icu",
   ]