[VSync Queue] Flush input in CommitComplete()

testing/variations/fieldtrial_testing_config.json

 {
     "AlternateComponentUrls": [
         {
             "platforms": [
                 "android",
                 "chromeos",
                 "ios",
                 "linux",
                 "mac",
                 "win"
@@ skipping 3184 matching lines @@
             "experiments": [
                 {
                     "name": "Enabled",
                     "enable_features": [
                         "VrShell"
                     ]
                 }
             ]
         }
     ],
+    "VsyncAlignedInput": [

[dtapuska, 2017/04/27 16:24:44]

The variation change should be a separate change entirely.

[chongz, 2017/04/27 19:12:14]

Removed. Was uploaded for telemetry testing.

+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "linux",
+                "mac",
+                "win"
+            ],
+            "experiments": [
+                {
+                    "name": "Enable",
+                    "enable_features": [
+                        "RequestUnbufferedDispatch",
+                        "VsyncAlignedInput"
+                    ]
+                }
+            ]
+        }
+    ],
     "WebApkGooglePlay": [
         {
             "platforms": [
                 "android"
             ],
             "experiments": [
                 {
                     "name": "Enabled",
                     "enable_features": [
                         "ImprovedA2HS"
@@ skipping 130 matching lines @@
                 {
                     "name": "Enabled",
                     "enable_features": [
                         "use-new-media-cache"
                     ]
                 }
             ]
         }
     ]
 }