DevTools: [CSS] Add CSS.setMultipleStyleTexts command to CSS domain

third_party/WebKit/Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications.",
@@ skipping 3156 matching lines @@
             {
                 "id": "CSSKeyframeRule",
                 "type": "object",
                 "properties": [
                     { "name": "styleSheetId", "$ref": "StyleSheetId", "optional": true, "description": "The css style sheet identifier (absent for user agent stylesheet and user-specified stylesheet rules) this rule came from." },
                     { "name": "origin", "$ref": "StyleSheetOrigin", "description": "Parent stylesheet's origin."},
                     { "name": "keyText", "$ref": "Value", "description": "Associated key text." },
                     { "name": "style", "$ref": "CSSStyle", "description": "Associated style declaration." }
                 ],
                 "description": "CSS keyframe rule representation."
+            },
+            {
+                "id": "StyleDeclarationEdit",
+                "type": "object",
+                "properties": [
+                    { "name": "styleSheetId", "$ref": "StyleSheetId", "description": "The css style sheet identifier." },
+                    { "name": "range", "$ref": "SourceRange", "description": "The range of the style text in the enclosing stylesheet." },
+                    { "name": "text", "type": "string", "description": "New style text."}
+                ],
+                "description": "A descriptor of operation to mutate style declaration text."
             }
         ],
         "commands": [
             {
                 "name": "enable",
                 "async": true,
                 "description": "Enables the CSS agent for the given page. Clients should not assume that the CSS agent has been enabled until the result of this command is received."
             },
             {
                 "name": "disable",
@@ skipping 85 matching lines @@
                     { "name": "styleSheetId", "$ref": "StyleSheetId" },
                     { "name": "range", "$ref": "SourceRange" },
                     { "name": "keyText", "type": "string" }
                 ],
                 "returns": [
                     { "name": "keyText", "$ref": "Value", "description": "The resulting key text after modification." }
                 ],
                 "description": "Modifies the keyframe rule key text."
             },
             {
-                "name": "setStyleText",
+                "name": "setStyleTexts",
                 "parameters": [
-                    { "name": "styleSheetId", "$ref": "StyleSheetId" },
-                    { "name": "range", "$ref": "SourceRange" },
-                    { "name": "text", "type": "string" }
+                    { "name": "edits", "type": "array", "items": { "$ref": "StyleDeclarationEdit" }}
                 ],
                 "returns": [
-                    { "name": "style", "$ref": "CSSStyle", "description": "The resulting style after the selector modification." }
+                    { "name": "styles", "type": "array", "items": { "$ref": "CSSStyle" }, "description": "The resulting styles after modification." }
                 ],
-                "description": "Modifies the style text."
+                "description": "Applies specified style edits one after another in the given order."
             },
             {
                 "name": "setMediaText",
                 "parameters": [
                     { "name": "styleSheetId", "$ref": "StyleSheetId" },
                     { "name": "range", "$ref": "SourceRange" },
                     { "name": "text", "type": "string" }
                 ],
                 "returns": [
                     { "name": "media", "$ref": "CSSMedia", "description": "The resulting CSS media rule after modification." }
@@ skipping 1989 matching lines @@
                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$ref": "AXNode", "description": "The <code>Accessibility.AXNode</code> for this DOM node, if it exists.", "optional": true }
                 ],
                 "description": "Fetches the accessibility node for this DOM node, if it exists.",
                 "hidden": true
             }
         ]
     }]
 }