Add source line info for JS Profiler ticks to debug protocol.

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index 205f306816462c8238ec3aabff4f07a76dca5181..3c6cf38f0a5025de92c06f3e058a567826bab1b1 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -3647,7 +3647,8 @@
                     { "name": "callUID", "type": "number", "description": "Call UID." },
                     { "name": "children", "type": "array", "items": { "$ref": "CPUProfileNode" }, "description": "Child nodes." },
                     { "name": "deoptReason", "type": "string", "description": "The reason of being not optimized. The function may be deoptimized or marked as don't optimize."},
-                    { "name": "id", "type": "integer", "description": "Unique id of the node." }
+                    { "name": "id", "type": "integer", "description": "Unique id of the node." },
+                    { "name": "positionTicks", "type": "array", "items": { "$ref": "PositionTickInfo" }, "description": "An array of source position ticks." }
                 ]
             },
             {
@@ -3661,6 +3662,15 @@
                     { "name": "samples", "optional": true, "type": "array", "items": { "type": "integer" }, "description": "Ids of samples top nodes." },
                     { "name": "timestamps", "optional": true, "type": "array", "items": { "type": "number" }, "description": "Timestamps of the samples in microseconds." }
                 ]
+            },
+            {
+                "id": "PositionTickInfo",
+                "type": "object",
+                "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." }
+                ]
             }
         ],
         "commands": [