Adds enableVirtualTime and setVirtualTimePolicy To Emulation domain.

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

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications.",
@@ skipping 652 matching lines @@
         "hidden": true,
         "types": [
             {
                 "id": "ScreenOrientation",
                 "type": "object",
                 "description": "Screen orientation.",
                 "properties": [
                     { "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"

[dgozman, 2016/07/05 15:30:35]

We prefer to not include links here, since it's published for end-users. Can we
copy descriptions from the last table in the document?

[alex clarke (OOO till 29th), 2016/07/05 16:51:23]

Done.

             }
         ],
         "commands": [
             {
                 "name": "setDeviceMetricsOverride",
                 "description": "Overrides the values of device screen dimensions (window.screen.width, window.screen.height, window.innerWidth, window.innerHeight, and \"device-width\"/\"device-height\"-related CSS media query results).",
                 "parameters": [
                     { "name": "width", "type": "integer", "description": "Overriding width value in pixels (minimum 0, maximum 10000000). 0 disables the override." },
                     { "name": "height", "type": "integer", "description": "Overriding height value in pixels (minimum 0, maximum 10000000). 0 disables the override." },
                     { "name": "deviceScaleFactor", "type": "number", "description": "Overriding device scale factor value. 0 disables the override." },
@@ skipping 71 matching lines @@
                 ],
                 "description": "Enables CPU throttling to emulate slow CPUs."
             },
             {
                 "name": "canEmulate",
                 "description": "Tells whether emulation is supported.",
                 "returns": [
                     { "name": "result", "type": "boolean", "description": "True if emulation is supported." }
                 ],
                 "handlers": ["browser"]
+            },
+            {
+                "name": "enableVirtualTime",

[dgozman, 2016/07/05 15:30:35]

Why can't we disable it?

[alex clarke (OOO till 29th), 2016/07/05 16:51:23]

We could but I'm not sure it's a good idea to allow it.  The reason being the
virtual time base could get far ahead of real time and if we disable virtual
time that would leave any timers posted "stranded in the future".

+                "description": "Turns on virtual time for all frames, replacing real-time with a synthetic time source.",
+                "hidden": true
+            },
+            {
+                "name": "setVirtualTimePolicy",

[dgozman, 2016/07/05 15:30:35]

Should we add "disabled" to the list of policies and have just a single method?
Client will have to enable and immediately set the policy anyway. Let's make any
policy automatically enable virtual time?

[alex clarke (OOO till 29th), 2016/07/05 16:51:23]

See above.


to the list of policies and have just a single method?
Sure we can reduce this to a single method.

+                "description": "Sets the current virtual time policy for all frames.",
+                "parameters": [
+                    { "name": "policy", "$ref": "VirtualTimePolicy" }
+                ],
+                "hidden": true
             }
         ]
     },
     {
         "domain": "Security",
         "description": "Security",
         "hidden": true,
         "types": [
             {
                 "id": "CertificateId",
@@ skipping 3452 matching lines @@
                 "description": "Dispatches protocol message from the target with given id.",
                 "parameters": [
                     { "name": "targetId", "$ref": "TargetID" },
                     { "name": "message", "type": "string" }
                 ],
                 "handlers": ["browser"]
             }
         ]
     }]
 }