[inspector] extend protocol for code coverage.

src/inspector/js_protocol.json

Index: src/inspector/js_protocol.json
diff --git a/src/inspector/js_protocol.json b/src/inspector/js_protocol.json
index 8b08b0bda49b15093bee5a7896d15cc6205da653..658ca509d2e6cf5253029b20f786f52101955b07 100644
--- a/src/inspector/js_protocol.json
+++ b/src/inspector/js_protocol.json
@@ -204,6 +204,29 @@
                     { "name": "parent", "$ref": "StackTrace", "optional": true, "description": "Asynchronous JavaScript stack trace that preceded this stack, if available." },
                     { "name": "promiseCreationFrame", "$ref": "CallFrame", "optional": true, "experimental": true, "description": "Creation frame of the Promise which produced the next synchronous trace when resolved, if available." }
                 ]
+            },
+            {   "id": "CoverageRange",
+                "type": "object",
+                "description": "Coverage data for a source range.",
+                "properties": [
+                    { "name": "functionName", "type": "string", "description": "JavaScript function name." },
+                    { "name": "startLineNumber", "type": "integer", "description": "JavaScript script line number (0-based) for the range start." },
+                    { "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": "nested", "type": "array", "items": { "$ref": "CoverageRange" }, "description": "Nested inner coverage ranges." },
+                    { "name": "count", "type": "integer", "description": "Collected execution count of the source range." }
+                ]
+            },
+            {
+                "id": "ScriptCoverage",
+                "type": "object",
+                "description": "Coverage data for a script.",
+                "properties": [
+                    { "name": "scriptId", "$ref": "ScriptId", "description": "JavaScript script id." },
+                    { "name": "url", "type": "string", "description": "JavaScript script name or url." },
+                    { "name": "toplevel", "$ref": "CoverageRange", "description": "Coverage ranges for the top-level function." }
+                ]
             }
         ],
         "commands": [
@@ -343,6 +366,25 @@
                     { "name": "exceptionDetails", "$ref": "ExceptionDetails", "optional": true, "description": "Exception details."}
                 ],
                 "description": "Runs script with given id in a given context."
+            },
+            {
+                "name": "startPreciseCoverage",
+                "description": "Enable precise code coverage. Coverage data for JavaScript executed before enabling precise code coverage may be incomplete.",
+                "experimental": true
+            },
+            {
+                "name": "stopPreciseCoverage",
+                "description": "Disable precise code coverage.",
+                "experimental": true
+            },
+            {
+                "name": "collectCoverage",
+                "parameters": [],

[jgruber, 2017/02/16 09:42:35]

Can we remove empty parameters?

[Yang, 2017/02/16 09:51:13]

Good point.

+                "returns": [
+                    { "name": "result", "type": "array", "items": { "$ref": "ScriptCoverage" }, "description": "Coverage data for the current isolate." }
+                ],
+                "description": "Collect coverage data for the current isolate.",
+                "experimental": true
             }
         ],
         "events": [