[inspector] do not translate offset to line/column for coverage.

src/inspector/js_protocol.json

 {
     "version": { "major": "1", "minor": "2" },
     "domains": [
     {
         "domain": "Schema",
         "description": "Provides information about the protocol schema.",
         "types": [
             {
                 "id": "Domain",
                 "type": "object",
@@ skipping 830 matching lines @@
                 "description": "Specifies a number of samples attributed to a certain source position.",
                 "properties": [
                     { "name": "line", "type": "integer", "description": "Source line number (1-based)." },
                     { "name": "ticks", "type": "integer", "description": "Number of samples attributed to the source line." }
                 ]
             },
             {   "id": "CoverageRange",
                 "type": "object",
                 "description": "Coverage data for a source range.",
                 "properties": [
-                    { "name": "startLineNumber", "type": "integer", "description": "JavaScript script line number (0-based) for the range start." },

[pfeldman, 2017/03/09 21:18:53]

protocol lgtm. we can't change front-end though because the position-based API
is now in Node.

-                    { "name": "startColumnNumber", "type": "integer", "description": "JavaScript script column number (0-based) for the range start." },
-                    { "name": "endLineNumber", "type": "integer", "description": "JavaScript script line number (0-based) for the range end." },
-                    { "name": "endColumnNumber", "type": "integer", "description": "JavaScript script column number (0-based) for the range end." },
                     { "name": "startOffset", "type": "integer", "description": "JavaScript script source offset for the range start." },
                     { "name": "endOffset", "type": "integer", "description": "JavaScript script source offset for the range end." },
                     { "name": "count", "type": "integer", "description": "Collected execution count of the source range." }
                 ],
                 "experimental": true
             },
             {   "id": "FunctionCoverage",
                 "type": "object",
                 "description": "Coverage data for a JavaScript function.",
                 "properties": [
@@ skipping 210 matching lines @@
             {
                 "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."}
                 ]
             }
         ]
     }]
 }