Add configurable limit to allocations in heap profiler.

third_party/WebKit/Source/devtools/protocol.json

Index: third_party/WebKit/Source/devtools/protocol.json
diff --git a/third_party/WebKit/Source/devtools/protocol.json b/third_party/WebKit/Source/devtools/protocol.json
index 00002f8f276f9c4564031297401a94e010aea9a2..717bf3aef2e7779ef3fac4a25048ec3925180d48 100644
--- a/third_party/WebKit/Source/devtools/protocol.json
+++ b/third_party/WebKit/Source/devtools/protocol.json
@@ -4693,11 +4693,19 @@
                 ],
                 "description": "Memory dump trigger configuration."
             },
+            {   "id": "HeapProfilerOptions",
+                "type": "object",
+                "properties": [
+                  { "name": "breakdown_threshold_bytes", "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": "MemoryDumpTrigger" }, "optional": false, "description": "Memory dump trigger configuration." },
+                    { "name": "heap_profiler_options", "$ref": "HeapProfilerOptions", "optional": true, "description": "Provides additional options for the heap profiler." }
                 ],
                 "description": "Configuration for memory dump triggers. Used only when \"memory-infra\" category is enabled."
             },