[DevTools] Send source map content from frontend to backend

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.",
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                 "hidden": true,
                 "description": "Sets breakpoint on AsyncOperation callback handler."
             },
             {
                 "name": "removeAsyncOperationBreakpoint",
                 "parameters": [
                     { "name": "operationId", "type": "integer", "description": "ID of the async operation to remove breakpoint for." }
                 ],
                 "hidden": true,
                 "description": "Removes AsyncOperation breakpoint."
+            },
+            {
+                "name": "setSourceMapContent",
+                "parameters": [
+                    { "name": "scriptId", "$ref": "ScriptId", "description": "Identifier of the script." },
+                    { "name": "sourceMapURL", "type": "string", "description": "Source map's url." },
+                    { "name": "content", "type": "string", "description": "Source map's content." }
+                ],
+                "hidden": true,
+                "description": "Set source map's content on backend."
             }
         ],
         "events": [
             {
                 "name": "globalObjectCleared",
                 "description": "Called when global has been cleared and debugger client should reset its state. Happens upon navigation or reload."
             },
             {
                 "name": "scriptParsed",
                 "parameters": [
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                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$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
             }
         ]
     }]
 }