Add a manifest property declaring USB printers supported by an app.

extensions/common/api/printer_provider/usb_printer_manifest_unittest.cc

Index: extensions/common/api/printer_provider/usb_printer_manifest_unittest.cc
diff --git a/extensions/common/api/printer_provider/usb_printer_manifest_unittest.cc b/extensions/common/api/printer_provider/usb_printer_manifest_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cd35af12c1d24057928020dd4dc8bf7628cb1d54
--- /dev/null
+++ b/extensions/common/api/printer_provider/usb_printer_manifest_unittest.cc
@@ -0,0 +1,45 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "device/usb/usb_device_filter.h"
+#include "extensions/common/api/printer_provider/usb_printer_manifest_data.h"
+#include "extensions/common/manifest_test.h"
+#include "extensions/common/value_builder.h"
+
+namespace extensions {
+
+class UsbPrinterManifestTest : public ManifestTest {
+ public:
+  UsbPrinterManifestTest() {}
+  ~UsbPrinterManifestTest() override {}
+};
+
+TEST_F(UsbPrinterManifestTest, Filters) {
+  scoped_refptr<Extension> extension =
+      LoadAndExpectSuccess("usb_printers_filters.json");
+  const UsbPrinterManifestData* manifest_data =
+      UsbPrinterManifestData::Get(extension.get());
+  ASSERT_TRUE(manifest_data);
+  EXPECT_EQ(2u, manifest_data->filters().size());
+  EXPECT_TRUE(DictionaryBuilder()
+                  .Set("vendorId", 1)
+                  .Set("productId", 2)
+                  .Build()
+                  ->Equals(manifest_data->filters()[0].ToValue().get()));
+  EXPECT_TRUE(DictionaryBuilder()
+                  .Set("vendorId", 1)
+                  .Set("interfaceClass", 2)
+                  .Set("interfaceSubclass", 3)
+                  .Set("interfaceProtocol", 4)
+                  .Build()
+                  ->Equals(manifest_data->filters()[1].ToValue().get()));
+}
+
+TEST_F(UsbPrinterManifestTest, InvalidFilter) {
+  LoadAndExpectError(
+      "usb_printers_invalid_filter.json",
+      "Only one of productId or interfaceClass may be specified.");
+}
+
+}  // namespace extensions