[DevTools] Rename "emulateViewport" to "mobile".

LayoutTests/inspector/text-autosizing-override.html

Index: LayoutTests/inspector/text-autosizing-override.html
diff --git a/LayoutTests/inspector/text-autosizing-override.html b/LayoutTests/inspector/text-autosizing-override.html
index 3845103291b73dd30557f5a584ae004cc44f9777..e980bff0739d4f28ddf0ed433c598daac24f71e3 100644
--- a/LayoutTests/inspector/text-autosizing-override.html
+++ b/LayoutTests/inspector/text-autosizing-override.html
@@ -61,13 +61,13 @@
       },
 
       function checkAutosizedWithDeviceMetrics(next) {
-        PageAgent.invoke_setDeviceMetricsOverride({width: 0, height: 0, deviceScaleFactor: 0, emulateViewport: true, fitWindow: true}, function() {
+        PageAgent.invoke_setDeviceMetricsOverride({width: 0, height: 0, deviceScaleFactor: 0, mobile: true, fitWindow: true}, function() {
           assertAutosizingResult(true, next);
         });
       },
 
       function checkNotAutosizedWithDeviceMetrics(next) {
-        PageAgent.invoke_setDeviceMetricsOverride({width: 0, height: 0, deviceScaleFactor: 0, emulateViewport: false, fitWindow: true}, function() {
+        PageAgent.invoke_setDeviceMetricsOverride({width: 0, height: 0, deviceScaleFactor: 0, mobile: false, fitWindow: true}, function() {
           assertAutosizingResult(false, next);
         });
       },
@@ -88,7 +88,7 @@
 
       function checkAutosizedWhenDeviceMetricsOverrideSettings(next) {
         InspectorTest.evaluateInPage("forceAutosizing(false)", function() {
-          PageAgent.invoke_setDeviceMetricsOverride({width: 0, height: 0, deviceScaleFactor: 0, emulateViewport: true, fitWindow: true}, function() {
+          PageAgent.invoke_setDeviceMetricsOverride({width: 0, height: 0, deviceScaleFactor: 0, mobile: true, fitWindow: true}, function() {
             assertAutosizingResult(true, next);
           });
         });