DevTools: Added properties to ScreencastFrameMetadata

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index 3a95302f4b2c4f4406bce17ebaa0304b21af1139..e15a8d7c764326f592965ea05a4ea17b3ddeeadf 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -200,7 +200,11 @@
                     { "name": "offsetBottom", "type": "number", "hidden": true, "optional": true, "description": "Bottom offset in DIP." },
                     { "name": "pageScaleFactor", "type": "number", "hidden": true, "description": "Page scale factor." },
                     { "name": "pageScaleFactorMin", "type": "number", "hidden": true, "description": "Page scale factor min." },
-                    { "name": "pageScaleFactorMax", "type": "number", "hidden": true, "description": "Page scale factor max." }
+                    { "name": "pageScaleFactorMax", "type": "number", "hidden": true, "description": "Page scale factor max." },
+                    { "name": "deviceWidth", "type": "number", "hidden": true, "description": "Device screen width in DIP." },
+                    { "name": "deviceHeight", "type": "number", "hidden": true, "description": "Device screen height in DIP." },
+                    { "name": "scrollOffsetX", "type": "number", "hidden": true, "description": "Position of horizontal scroll in CSS pixels." },
+                    { "name": "scrollOffsetY", "type": "number", "hidden": true, "description": "Position of vertical scroll in CSS pixels." }
                 ],
                 "hidden": true
             }