Add configurable limit to allocations in heap profiler.

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.",
@@ skipping 4679 matching lines @@
                 "properties": [
                     { "name": "mode", "type": "string", "enum": ["light", "detailed"], "description": "Level of detail of the triggered memory dumps." },
                     { "name": "periodicIntervalMs", "type": "integer", "description": "Length of the periodic intervals between the triggered memory dumps." }
                 ],
                 "description": "Memory dump trigger configuration."
             },
             {
                 "id": "MemoryDumpConfig",
                 "type": "object",
                 "properties": [
-                    { "name": "triggers", "type": "array", "items": { "$ref": "MemoryDumpTrigger" }, "optional": false, "description": "Memory dump trigger configuration." }
+                    { "name": "triggers", "type": "array", "items": { "$ref": "MemoryDumpTrigger" }, "optional": false, "description": "Memory dump trigger configuration." },
+                    { "name": "min_allocation_size_bytes", "type": "number", "optional": true, "description": "Provides a cut off value, if a trace allocates less than that, it is discarded." }

[Primiano Tucci (use gerrit), 2016/04/21 16:53:22]

I would probably not bother exposing this to the devtools protocol, unless we
have a need for it.

[caseq, 2016/04/26 01:15:07]

Well, it gets exposed automatically since we're reusing the trace config parser.
So it's just a matter of whether we document it here or not. I've no strong
feelings towards wither way, but I think we eventually need to get
chrome://tracing wired through the DevTools protocol rather than DOM UI
bindings, as it's already doing this in case of remote tracing.

                 ],
                 "description": "Configuration for memory dump triggers. Used only when \"memory-infra\" category is enabled."
             },
             {
                 "id": "TraceConfig",
                 "type": "object",
                 "properties": [
                     { "name": "recordMode", "type": "string", "optional": true, "enum": ["recordUntilFull", "recordContinuously", "recordAsMuchAsPossible", "echoToConsole"], "description": "Controls how the trace buffer stores data." },
                     { "name": "enableSampling", "type": "boolean", "optional": true, "description": "Turns on JavaScript stack sampling." },
                     { "name": "enableSystrace", "type": "boolean", "optional": true, "description": "Turns on system tracing." },
@@ skipping 366 matching lines @@
                 ],
                 "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
             }
         ]
     }]
 }