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 4675 matching lines @@
             {
                 "name": "clearDeviceOrientationOverride",
                 "description": "Clears the overridden Device Orientation."
             }
         ]
     },
     {
         "domain": "Tracing",
         "types": [
             {
-                "id": "MemoryDumpTrigger",
+                "id": "Trigger",
                 "type": "object",
                 "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": "HeapProfiler",

[pfeldman, 2016/04/29 02:14:27]

This is getting too hairy. Could we bring some sanity into the API? We are to
support and maintain it.

[Primiano Tucci (use gerrit), 2016/04/29 08:54:00]

Can we delay the exposure of this to the devtools protocol API until the heap
profiler changes are stabilized?
There are lot of changes on flight (dskiba@ recently introduced native heap
profiling mode, which would be yet another flag).
I think in ~1-2 months from now we'd be in the state of making a more conscious
decision about what we want to expose and allow us to model a more civilized
API.

+                "type": "object",
+                "properties": [
+                  { "name": "breakdownThresholdBytes", "type": "number", "optional": true, "description": "The threshold in bytes beneath which heap profiler stacks are not broken down any further" }
+                ],
+                "description": "Provides additional options for the heap profiler."
+            },
             {
                 "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": "Trigger" }, "optional": false, "description": "Memory dump trigger configuration." },
+                    { "name": "heapProfilerOptions", "$ref": "HeapProfiler", "optional": true, "description": "Provides additional options for the heap profiler." }
                 ],
                 "description": "Configuration for memory dump triggers. Used only when \"memory-infra\" category is enabled."
             },
             {
                 "id": "TraceConfig",
                 "type": "object",
                 "properties": [
                     { "name": "recordMode", "type": "string", "optional": true, "enum": ["recordUntilFull", "recordContinuously", "recordAsMuchAsPossible", "echoToConsole"], "description": "Controls how the trace buffer stores data." },
                     { "name": "enableSampling", "type": "boolean", "optional": true, "description": "Turns on JavaScript stack sampling." },
                     { "name": "enableSystrace", "type": "boolean", "optional": true, "description": "Turns on system tracing." },
@@ skipping 366 matching lines @@
                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$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
             }
         ]
     }]
 }