Adds scroll position/scale emulation to DevTools.

third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-visual-viewport-size-expected.txt

Index: third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-visual-viewport-size-expected.txt
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-visual-viewport-size-expected.txt b/third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-visual-viewport-size-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..11292b9d1add2c34a49b95b307659794e776c6dd
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/emulation/device-emulation-visual-viewport-size-expected.txt
@@ -0,0 +1,131 @@
+Tests overrides for visual viewport size in combination with frame size overrides.
+
+
+Running test: noOverrides
+Overrides: {"width":0,"height":0,"visualViewportWidth":0,"visualViewportHeight":0,"deviceScaleFactor":0,"mobile":false,"fitWindow":false}
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+Clearing overrides.
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+
+Running test: width
+Overrides: {"width":200,"height":0,"visualViewportWidth":0,"visualViewportHeight":0,"deviceScaleFactor":0,"mobile":false,"fitWindow":false}
+{
+    "visualWidth": 200,
+    "visualHeight": 600,
+    "layoutWidth": 200,
+    "layoutHeight": 600
+}
+Clearing overrides.
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+
+Running test: height
+Overrides: {"width":0,"height":200,"visualViewportWidth":0,"visualViewportHeight":0,"deviceScaleFactor":0,"mobile":false,"fitWindow":false}
+{
+    "visualWidth": 800,
+    "visualHeight": 200,
+    "layoutWidth": 800,
+    "layoutHeight": 200
+}
+Clearing overrides.
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+
+Running test: visualWidth
+Overrides: {"width":0,"height":0,"visualViewportWidth":100,"visualViewportHeight":0,"deviceScaleFactor":0,"mobile":false,"fitWindow":false}
+{
+    "visualWidth": 100,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+Clearing overrides.
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+
+Running test: visualHeight
+Overrides: {"width":0,"height":0,"visualViewportWidth":0,"visualViewportHeight":100,"deviceScaleFactor":0,"mobile":false,"fitWindow":false}
+{
+    "visualWidth": 800,
+    "visualHeight": 100,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+Clearing overrides.
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+
+Running test: visualWidthAndHeight
+Overrides: {"width":0,"height":0,"visualViewportWidth":100,"visualViewportHeight":150,"deviceScaleFactor":0,"mobile":false,"fitWindow":false}
+{
+    "visualWidth": 100,
+    "visualHeight": 150,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+Clearing overrides.
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+
+Running test: visualAndFrame
+Overrides: {"width":200,"height":250,"visualViewportWidth":100,"visualViewportHeight":150,"deviceScaleFactor":0,"mobile":false,"fitWindow":false}
+{
+    "visualWidth": 100,
+    "visualHeight": 150,
+    "layoutWidth": 200,
+    "layoutHeight": 250
+}
+Clearing overrides.
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+
+Running test: visualLargerThanFrame
+Overrides: {"width":100,"height":150,"visualViewportWidth":200,"visualViewportHeight":250,"deviceScaleFactor":0,"mobile":false,"fitWindow":false}
+{
+    "visualWidth": 200,
+    "visualHeight": 250,
+    "layoutWidth": 100,
+    "layoutHeight": 150
+}
+Clearing overrides.
+{
+    "visualWidth": 800,
+    "visualHeight": 600,
+    "layoutWidth": 800,
+    "layoutHeight": 600
+}
+