[Payment Request] Populates region field if region code/name is valid.

ios/chrome/browser/ui/payments/region_data_loader_unittest.mm

Index: ios/chrome/browser/ui/payments/region_data_loader_unittest.mm
diff --git a/ios/chrome/browser/ui/payments/region_data_loader_unittest.mm b/ios/chrome/browser/ui/payments/region_data_loader_unittest.mm
index 54e455c0818d17b1b0afcc5e24466656646b935b..de94cab3ab9d28b66ed07185e8dd1b15e1ea95a3 100644
--- a/ios/chrome/browser/ui/payments/region_data_loader_unittest.mm
+++ b/ios/chrome/browser/ui/payments/region_data_loader_unittest.mm
@@ -21,8 +21,10 @@
 #endif
 
 namespace {
-const char kQuebec[] = "QC";
-const char kOntario[] = "ON";
+const char kQuebecCode[] = "QC";
+const char kOntarioCode[] = "ON";
+const char kQuebec[] = "Quebec";
+const char kOntario[] = "Ontario";
 }  // namespace
 
 class PaymentRequestRegionDataLoaderTest : public PlatformTest {
@@ -38,17 +40,18 @@ TEST_F(PaymentRequestRegionDataLoaderTest, SourceSuccess) {
   // Mock the consumer.
   id consumer =
       [OCMockObject mockForProtocol:@protocol(RegionDataLoaderConsumer)];
-  [[consumer expect] regionDataLoaderDidSucceedWithRegions:@[
-    base::SysUTF8ToNSString(kQuebec), base::SysUTF8ToNSString(kOntario)
-  ]];
+  [[consumer expect] regionDataLoaderDidSucceedWithRegions:@{
+    base::SysUTF8ToNSString(kQuebecCode) : base::SysUTF8ToNSString(kQuebec),
+    base::SysUTF8ToNSString(kOntarioCode) : base::SysUTF8ToNSString(kOntario)
+  }];
 
   RegionDataLoader region_data_loader(consumer);
   region_data_loader.LoadRegionData("some country",
                                     &autofill_region_data_loader_);
 
   std::vector<std::pair<std::string, std::string>> regions;
-  regions.push_back(std::make_pair(kQuebec, "Quebec"));
-  regions.push_back(std::make_pair(kOntario, "Ontario"));
+  regions.push_back(std::make_pair(kQuebecCode, kQuebec));
+  regions.push_back(std::make_pair(kOntarioCode, kOntario));
   autofill_region_data_loader_.SendAsynchronousData(regions);
 
   EXPECT_OCMOCK_VERIFY(consumer);
@@ -59,7 +62,7 @@ TEST_F(PaymentRequestRegionDataLoaderTest, SourceFailure) {
   // Mock the consumer.
   id consumer =
       [OCMockObject mockForProtocol:@protocol(RegionDataLoaderConsumer)];
-  [[consumer expect] regionDataLoaderDidSucceedWithRegions:@[]];
+  [[consumer expect] regionDataLoaderDidSucceedWithRegions:@{}];
 
   RegionDataLoader region_data_loader(consumer);
   region_data_loader.LoadRegionData("some country",