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 92da94fe533f82d51308b740d9fe1a991129fdd4..7c2cb12c7a08fe77533a5b078fba52bcddf4f5a4 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": "advance: If the scheduler runs out of immediate work, the virtual time base may fast forward to allow the next delayed task (if any) to run; pause: The virtual time base may not advance; pauseIfNetworkFetchesPending: The virtual time base may not advance if there are any pending resource fetches."
             }
         ],
         "commands": [
@@ -761,6 +771,14 @@
                     { "name": "result", "type": "boolean", "description": "True if emulation is supported." }
                 ],
                 "handlers": ["browser"]
+            },
+            {
+                "name": "setVirtualTimePolicy",
+                "description": "Turns on virtual time for all frames (replacing real-time with a synthetic time source) and sets the current virtual time policy.",
+                "parameters": [
+                    { "name": "policy", "$ref": "VirtualTimePolicy" }
+                ],
+                "hidden": true
             }
         ]
     },