Adds enableVirtualTime and setVirtualTimePolicy To Emulation domain.

third_party/WebKit/Source/core/inspector/browser_protocol.json

Index: third_party/WebKit/Source/core/inspector/browser_protocol.json
diff --git a/third_party/WebKit/Source/core/inspector/browser_protocol.json b/third_party/WebKit/Source/core/inspector/browser_protocol.json
index a27991a3a75b2ca4fa629da9c3575e835791833b..d69c61a9373b66a4d939f2707f50a285460c744d 100644
--- a/third_party/WebKit/Source/core/inspector/browser_protocol.json
+++ b/third_party/WebKit/Source/core/inspector/browser_protocol.json
@@ -670,6 +670,16 @@
                     { "name": "type",  "type": "string", "enum": ["portraitPrimary", "portraitSecondary", "landscapePrimary", "landscapeSecondary"], "description": "Orientation type." },
                     { "name": "angle",  "type": "integer", "description": "Orientation angle." }
                 ]
+            },
+            {
+                "id": "VirtualTimePolicy",
+                "type": "string",
+                "enum": [
+                    "advance",
+                    "pause",
+                    "pauseIfNetworkFetchesPending"
+                ],
+                "description": "For a description of the virtual time policies see: https://docs.google.com/document/d/1y9KDT_ZEzT7pBeY6uzVt1dgKlwc1OB_vY4NZO1zBQmo"
             }
         ],
         "commands": [
@@ -761,6 +771,19 @@
                     { "name": "result", "type": "boolean", "description": "True if emulation is supported." }
                 ],
                 "handlers": ["browser"]
+            },
+            {
+                "name": "enableVirtualTime",
+                "description": "Turns on virtual time for all frames, replacing real-time with a synthetic time source.",
+                "hidden": true
+            },
+            {
+                "name": "setVirtualTimePolicy",
+                "description": "Sets the current virtual time policy for all frames.",
+                "parameters": [
+                    { "name": "policy", "$ref": "VirtualTimePolicy" }
+                ],
+                "hidden": true
             }
         ]
     },