[DevTools] Migrate inspector-protocol/emulation tests to new harness

third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-980-only-viewport.js

Index: third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-980-only-viewport.js
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-980-only-viewport.js b/third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-980-only-viewport.js
new file mode 100644
index 0000000000000000000000000000000000000000..3e3b6dbe4eec93657675e66f1438b3949649c7ff
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-980-only-viewport.js
@@ -0,0 +1,14 @@
+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startBlank('Tests that device emulation affects media rules, viewport meta tag, body dimensions and window.screen.');
+
+  var DeviceEmulator = await testRunner.loadScript('../resources/device-emulator.js');
+  var deviceEmulator = new DeviceEmulator(testRunner, session);
+  await deviceEmulator.emulate(0, 0, 0);
+
+  var viewport = 'w=980';
+  testRunner.log(`Loading page with viewport=${viewport}`);
+  await session.navigate('../resources/device-emulation.html?' + viewport);
+
+  testRunner.log(await session.evaluate(`dumpMetrics(false)`));
+  testRunner.completeTest();
+})