Adds scroll position/scale emulation to DevTools.

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 7b26c7571abd047f450ea0856f30658875fa06db..80b1183f583d34d1a8c824436032130e07a69f8e 100644
--- a/third_party/WebKit/Source/core/inspector/browser_protocol.json
+++ b/third_party/WebKit/Source/core/inspector/browser_protocol.json
@@ -689,7 +689,15 @@
                     { "name": "screenHeight", "type": "integer", "optional": true, "description": "Overriding screen height value in pixels (minimum 0, maximum 10000000). Only used for |mobile==true|." },
                     { "name": "positionX", "type": "integer", "optional": true, "description": "Overriding view X position on screen in pixels (minimum 0, maximum 10000000). Only used for |mobile==true|." },
                     { "name": "positionY", "type": "integer", "optional": true, "description": "Overriding view Y position on screen in pixels (minimum 0, maximum 10000000). Only used for |mobile==true|." },
-                    { "name": "screenOrientation", "$ref": "ScreenOrientation", "optional": true, "description": "Screen orientation override." }
+                    { "name": "screenOrientation", "$ref": "ScreenOrientation", "optional": true, "description": "Screen orientation override." },
+                    { "name": "scrollPositionX", "type": "integer", "optional": true, "description": "Fix horizontal scroll position of outer viewport (frame) to an override value (device-independent pixel)." },
+                    { "name": "scrollPositionY", "type": "integer", "optional": true, "description": "Fix  vertical scroll position of outer viewport (frame) to an override value (device-independent pixel)." },
+                    { "name": "visualViewportWidth", "type": "integer", "optional": true, "description": "Override height of inner (visual) viewport (pixels, minimum 0, maximum 10000000). Optional, defaults to |width|." },
+                    { "name": "visualViewportHeight", "type": "integer", "optional": true, "description": "Override height of inner (visual) viewport (pixels, minimum 0, maximum 10000000). Optional, defaults to |height|." },
+                    { "name": "visualViewportPositionX", "type": "number", "optional": true, "description": "Fix horizontal scroll position of inner (visual) viewport to an override value (partial device-independent pixels, relative to |scrollPositionX|)." },
+                    { "name": "visualViewportPositionY", "type": "number", "optional": true, "description": "Fix vertical scroll position of inner (visual) viewport to an override value (partial device-independent pixels, relative to |scrollPositionY|)." },
+                    { "name": "visualViewportScale", "type": "number", "optional": true, "description": "Fix pinch-zoom scale of the inner (visual) viewport to an override value (0 < value <= 10.0, 1.0 is default-scale)." },
+                    { "name": "resizeWindow", "type": "boolean", "optional": true, "description": "If enabled, apply |width| and |height| overrides to the browser window bounds, too." }
                 ],
                 "handlers": ["browser"]
             },