Adds scroll position/scale emulation to DevTools.

third_party/WebKit/public/web/WebDeviceEmulationParams.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebDeviceEmulationParams_h
 #define WebDeviceEmulationParams_h
 
 #include "../platform/WebFloatPoint.h"
 #include "../platform/WebPoint.h"
 #include "../platform/WebRect.h"
@@ skipping 35 matching lines @@
     // Scale of emulated view inside available space, not in fit to view mode.
     float scale;
 
     // Optional screen orientation type, with WebScreenOrientationUndefined
     // value meaning no emulation necessary.
     WebScreenOrientationType screenOrientationType;
 
     // Screen orientation angle, used together with screenOrientationType.
     int screenOrientationAngle;
 
+    // Scroll position of outer viewport (frame). |x < 0| or |y < 0| disables
+    // the override for the respective coordinate.
+    WebPoint scrollPosition;
+
+    // Emulated visible view size. |x < 0| or |y < 0| disables the override for
+    // the respective coordinate.
+    WebSize visualViewportSize;
+
+    // Scroll position of inner (visual) viewport. |x < 0| or |y < 0| disables
+    // the override for the respective coordinate.
+    WebFloatPoint visualViewportPosition;
+
+    // Pinch-zoom scale of inner (visual) viewport. |visualViewportScale == 0|
+    // disables the override.
+    double visualViewportScale;
+
     WebDeviceEmulationParams()
         : screenPosition(Desktop)
         , deviceScaleFactor(0)
         , fitToView(false)
         , scale(1)
         , screenOrientationType(WebScreenOrientationUndefined)
-        , screenOrientationAngle(0) { }
+        , screenOrientationAngle(0)
+        , visualViewportScale(0) { }
 };
 
 inline bool operator==(const WebDeviceEmulationParams& a, const WebDeviceEmulationParams& b)
 {
     return a.screenPosition == b.screenPosition && a.screenSize == b.screenSize && a.viewPosition == b.viewPosition && a.deviceScaleFactor == b.deviceScaleFactor
         && a.viewSize == b.viewSize && a.fitToView == b.fitToView && a.offset == b.offset && a.scale == b.scale
-        && a.screenOrientationType == b.screenOrientationType && a.screenOrientationAngle == b.screenOrientationAngle;
+        && a.screenOrientationType == b.screenOrientationType && a.screenOrientationAngle == b.screenOrientationAngle && a.scrollPosition == b.scrollPosition
+        && a.visualViewportSize == b.visualViewportSize && a.visualViewportPosition == b.visualViewportPosition && a.visualViewportScale == b.visualViewportScale;
 }
 
 inline bool operator!=(const WebDeviceEmulationParams& a, const WebDeviceEmulationParams& b)
 {
     return !(a == b);
 }
 
 } // namespace blink
 
 #endif