[DevTools] Implement screen orientation override.

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index 0ea7455e901efa3ced3bf93a956123aa20332272..46bedd5ee92fd76aff2ae06c879a7b0cdf25c636 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -4660,6 +4660,32 @@
         ]
     },
     {
+        "domain": "ScreenOrientation",
+        "hidden": true,
+        "types": [
+            {
+                "id": "OrientationType",
+                "type": "string",
+                "enum": ["portraitPrimary", "portraitSecondary", "landscapePrimary", "landscapeSecondary"],
+                "description": "Orientation type"
+            }
+        ],
+        "commands": [
+            {
+                "name": "setScreenOrientationOverride",
+                "description": "Overrides the Screen Orientation.",
+                "parameters": [
+                    { "name": "angle", "type": "integer", "description": "Orientation angle" },
+                    { "name": "type", "$ref": "OrientationType", "description": "Orientation type" }
+                ]
+            },
+            {
+                "name": "clearScreenOrientationOverride",
+                "description": "Clears the overridden Screen Orientation."
+            }
+        ]
+    },
+    {
         "domain": "Tracing",
         "commands": [
             {