Change WebVR Motopho test links

Updates the links used for the WebVR motion to photon latency tests to
be more similar to the ones used for the WebVR Telemetry tests.

Change-Id: I0830eaa9d2a5cd2f79fbed71fe013de3092cc815
Reviewed-on: https://chromium-review.googlesource.com/1000729Reviewed-by: Klaus Weidner <klausw@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549210}

chrome/test/vr/perf/latency/webvr_latency_test.py

@@ -25,21 +25,17 @@ DEFAULT_URLS = [
     'https://webvr.info/samples/test-slow-render.html?'
     'latencyPatch=1\&canvasClickPresents=1\&'
     'heavyGpu=1\&workTime=20\&cubeCount=8\&cubeScale=0.4',
-    # Moderate CPU load, light GPU load.
+    # No additional CPU load, very light GPU load.
     'https://webvr.info/samples/test-slow-render.html?'
-    'latencyPatch=1\&canvasClickPresents=1\&'
-    'heavyGpu=1\&workTime=12\&cubeCount=8\&cubeScale=0.3',
-    # Light CPU load, moderate GPU load.
+    'latencyPatch=1\&canvasClickPresents=1',
+    # Increased render scale
     'https://webvr.info/samples/test-slow-render.html?'
     'latencyPatch=1\&canvasClickPresents=1\&'
-    'heavyGpu=1\&workTime=5\&cubeCount=8\&cubeScale=0.4',
-    # Heavy CPU load, very light GPU load.
+    'renderScale=1.5',
+    # Default render scale, increased load
     'https://webvr.info/samples/test-slow-render.html?'
     'latencyPatch=1\&canvasClickPresents=1\&'
-    'workTime=20',
-    # No additional CPU load, very light GPU load.
-    'https://webvr.info/samples/test-slow-render.html?'
-    'latencyPatch=1\&canvasClickPresents=1',
+    'renderScale=1\&heavyGpu=1\&cubeScale=0.3\&workTime=10',
 ]