[chrome.dial] Adds chrome.dial.fetchDeviceDecription API.

chrome/browser/extensions/api/dial/dial_apitest.cc

Index: chrome/browser/extensions/api/dial/dial_apitest.cc
diff --git a/chrome/browser/extensions/api/dial/dial_apitest.cc b/chrome/browser/extensions/api/dial/dial_apitest.cc
index 73ef7ab600db024d07a6f3343f0acb607da39aa4..ad4f7255028f4b42519fc0f1c597b0bebe7e060e 100644
--- a/chrome/browser/extensions/api/dial/dial_apitest.cc
+++ b/chrome/browser/extensions/api/dial/dial_apitest.cc
@@ -16,6 +16,7 @@
 #include "url/gurl.h"
 
 using extensions::DialDeviceData;
+using extensions::DialDeviceDescription;
 using extensions::Extension;
 
 namespace api = extensions::api;
@@ -115,3 +116,22 @@ IN_PROC_BROWSER_TEST_F(DialAPITest, NonWhitelistedExtension) {
 IN_PROC_BROWSER_TEST_F(DialAPITest, OnError) {
   ASSERT_TRUE(RunExtensionSubtest("dial/experimental", "on_error.html"));
 }
+
+IN_PROC_BROWSER_TEST_F(DialAPITest, FetchDeviceDescription) {
+  scoped_refptr<extensions::DialAPI> api =
+      extensions::DialAPIFactory::GetInstance()->GetForBrowserContext(
+          profile());
+  ASSERT_TRUE(api.get());
+
+  DialDeviceData test_device("testDeviceId",
+                             GURL("http://127.0.0.1/description.xml"),
+                             base::Time::Now());
+  test_device.set_label("testDevice");
+
+  DialDeviceDescription test_description("<xml>testDescription</xml>",
+                                         GURL("http://127.0.0.1/apps"));
+  api->SetDeviceForTest(test_device, test_description);
+
+  ASSERT_TRUE(RunExtensionSubtest("dial/experimental",
+                                  "fetch_device_description.html"));
+}