DevTools: Allow setting -0 value to object property

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 694 matching lines @@
         "commands": [
             {
                 "name": "evaluate",
                 "parameters": [
                     { "name": "expression", "type": "string", "description": "Expression to evaluate." },
                     { "name": "objectGroup", "type": "string", "optional": true, "description": "Symbolic group name that can be used to release multiple objects." },
                     { "name": "includeCommandLineAPI", "type": "boolean", "optional": true, "description": "Determines whether Command Line API should be available during the evaluation.", "hidden": true },
                     { "name": "doNotPauseOnExceptionsAndMuteConsole", "type": "boolean", "optional": true, "description": "Specifies whether evaluation should stop on exceptions and mute console. Overrides setPauseOnException state.", "hidden": true },
                     { "name": "contextId", "$ref": "Runtime.ExecutionContextId", "optional": true, "description": "Specifies in which isolated context to perform evaluation. Each content script lives in an isolated context and this parameter may be used to specify one of those contexts. If the parameter is omitted or 0 the evaluation will be performed in the context of the inspected page." },
                     { "name": "returnByValue", "type": "boolean", "optional": true, "description": "Whether the result is expected to be a JSON object that should be sent by value." },
+                    { "name": "forceObjectId", "type": "boolean", "optional": true, "hidden": true, "description": "If true, will generate a <code>RemoteObject.objectId</code> even for primitive values. The call site is responsibile for releasing this object." },
                     { "name": "generatePreview", "type": "boolean", "optional": true, "hidden": true, "description": "Whether preview should be generated for the result." }
                 ],
                 "returns": [
                     { "name": "result", "$ref": "RemoteObject", "description": "Evaluation result." },
                     { "name": "wasThrown", "type": "boolean", "optional": true, "description": "True if the result was thrown during the evaluation." }
                 ],
                 "description": "Evaluates expression on global object."
             },
             {
                 "name": "callFunctionOn",
                 "parameters": [
                     { "name": "objectId", "$ref": "RemoteObjectId", "description": "Identifier of the object to call function on." },
                     { "name": "functionDeclaration", "type": "string", "description": "Declaration of the function to call." },
                     { "name": "arguments", "type": "array", "items": { "$ref": "CallArgument", "description": "Call argument." }, "optional": true, "description": "Call arguments. All call arguments must belong to the same JavaScript world as the target object." },
                     { "name": "doNotPauseOnExceptionsAndMuteConsole", "type": "boolean", "optional": true, "description": "Specifies whether function call should stop on exceptions and mute console. Overrides setPauseOnException state.", "hidden": true },
                     { "name": "returnByValue", "type": "boolean", "optional": true, "description": "Whether the result is expected to be a JSON object which should be sent by value." },
+                    { "name": "forceObjectId", "type": "boolean", "optional": true, "hidden": true, "description": "If true, will generate a <code>RemoteObject.objectId</code> even for primitive values. The call site is responsibile for releasing this object." },
                     { "name": "generatePreview", "type": "boolean", "optional": true, "hidden": true, "description": "Whether preview should be generated for the result." }
                 ],
                 "returns": [
                     { "name": "result", "$ref": "RemoteObject", "description": "Call result." },
                     { "name": "wasThrown", "type": "boolean", "optional": true, "description": "True if the result was thrown during the evaluation." }
                 ],
                 "description": "Calls function with given declaration on the given object. Object group of the result is inherited from the target object."
             },
             {
                 "name": "getProperties",
@@ skipping 2425 matching lines @@
             },
             {
                 "name": "evaluateOnCallFrame",
                 "parameters": [
                     { "name": "callFrameId", "$ref": "CallFrameId", "description": "Call frame identifier to evaluate on." },
                     { "name": "expression", "type": "string", "description": "Expression to evaluate." },
                     { "name": "objectGroup", "type": "string", "optional": true, "description": "String object group name to put result into (allows rapid releasing resulting object handles using <code>releaseObjectGroup</code>)." },
                     { "name": "includeCommandLineAPI", "type": "boolean", "optional": true, "description": "Specifies whether command line API should be available to the evaluated expression, defaults to false.", "hidden": true },
                     { "name": "doNotPauseOnExceptionsAndMuteConsole", "type": "boolean", "optional": true, "description": "Specifies whether evaluation should stop on exceptions and mute console. Overrides setPauseOnException state.", "hidden": true },
                     { "name": "returnByValue", "type": "boolean", "optional": true, "description": "Whether the result is expected to be a JSON object that should be sent by value." },
+                    { "name": "forceObjectId", "type": "boolean", "optional": true, "hidden": true, "description": "If true, will generate a <code>RemoteObject.objectId</code> even for primitive values. The call site is responsibile for releasing this object." },

[pfeldman, 2013/11/23 15:58:13]

I don't think it is a good idea since it makes protocol more complex. We either

1) need to pass these values as handles at all times (i.e. have this set to
true), or
2) serialize special values in strings when encoding them in JSON.

Both are a lot of work due to the following assumptions:
1) when remoteObject.type is "object", we will try to get its property names.
2) If remoteObject.type is "number", with think remoteObject.value is a number

                     { "name": "generatePreview", "type": "boolean", "optional": true, "hidden": true, "description": "Whether preview should be generated for the result." }
                 ],
                 "returns": [
                     { "name": "result", "$ref": "Runtime.RemoteObject", "description": "Object wrapper for the evaluation result." },
                     { "name": "wasThrown", "type": "boolean", "optional": true, "description": "True if the result was thrown during the evaluation." }
                 ],
                 "description": "Evaluates expression on a given call frame."
             },
             {
                 "name": "compileScript",
@@ skipping 858 matching lines @@
                 "parameters": [
                     { "name": "value", "type": "array", "items": { "type": "object" } }
                 ]
             },
             {
                 "name": "tracingComplete"
             }
         ]
     }]
 }