[DevTools] make Runtime.CallFrame 0-based

third_party/WebKit/Source/platform/v8_inspector/js_protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Runtime",
         "description": "Runtime domain exposes JavaScript runtime by means of remote evaluation and mirror objects. Evaluation results are returned as mirror object that expose object type, string representation and unique identifier that can be used for further object reference. Original objects are maintained in memory unless they are either explicitly released or are released along with the other objects in their object group.",
         "types": [
             {
                 "id": "ScriptId",
                 "type": "string",
                 "description": "Unique script identifier."
@@ skipping 134 matching lines @@
                 ]
             },
             {
                 "id": "CallFrame",
                 "type": "object",
                 "description": "Stack entry for runtime errors and assertions.",
                 "properties": [
                     { "name": "functionName", "type": "string", "description": "JavaScript function name." },
                     { "name": "scriptId", "$ref": "ScriptId", "description": "JavaScript script id." },
                     { "name": "url", "type": "string", "description": "JavaScript script name or url." },
-                    { "name": "lineNumber", "type": "integer", "description": "JavaScript script line number." },
-                    { "name": "columnNumber", "type": "integer", "description": "JavaScript script column number." }
+                    { "name": "lineNumber", "type": "integer", "description": "JavaScript script line number (0-based)." },
+                    { "name": "columnNumber", "type": "integer", "description": "JavaScript script column number (0-based)." }
                 ]
             },
             {
                 "id": "StackTrace",
                 "type": "object",
                 "description": "Call frames for assertions or error messages.",
                 "properties": [
                     { "name": "description", "type": "string", "optional": true, "description": "String label of this stack trace. For async traces this may be a name of the function that initiated the async call." },
                     { "name": "callFrames", "type": "array", "items": { "$ref": "CallFrame" }, "description": "JavaScript function name." },
                     { "name": "parent", "$ref": "StackTrace", "optional": true, "hidden": true, "description": "Asynchronous JavaScript stack trace that preceded this stack, if available." }
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             {
                 "name": "heapStatsUpdate",
                 "description": "If heap objects tracking has been started then backend may send update for one or more fragments",
                 "parameters": [
                     { "name": "statsUpdate", "type": "array", "items": { "type": "integer" }, "description": "An array of triplets. Each triplet describes a fragment. The first integer is the fragment index, the second integer is a total count of objects for the fragment, the third integer is a total size of the objects for the fragment."}
                 ]
             }
         ]
     }]
 }