DevTools: unquote 'true' in the protocol definition.

third_party/WebKit/Source/core/inspector/browser_protocol.json

Index: third_party/WebKit/Source/core/inspector/browser_protocol.json
diff --git a/third_party/WebKit/Source/core/inspector/browser_protocol.json b/third_party/WebKit/Source/core/inspector/browser_protocol.json
index 47b69a64103e746c3a0ae185e4bc036f0c3b87bb..2032e3bd5ccc8b3951cebb9a8b808fa569275e86 100644
--- a/third_party/WebKit/Source/core/inspector/browser_protocol.json
+++ b/third_party/WebKit/Source/core/inspector/browser_protocol.json
@@ -4270,8 +4270,8 @@
                 "type": "object",
                 "properties": [
                     { "name": "devices", "type": "array", "items": { "$ref": "GPUDevice" }, "description": "The graphics devices on the system. Element 0 is the primary GPU." },
-                    { "name": "auxAttributes", "type": "object", "optional": "true", "description": "An optional dictionary of additional GPU related attributes." },
-                    { "name": "featureStatus", "type": "object", "optional": "true", "description": "An optional dictionary of graphics features and their status." },
+                    { "name": "auxAttributes", "type": "object", "optional": true, "description": "An optional dictionary of additional GPU related attributes." },
+                    { "name": "featureStatus", "type": "object", "optional": true, "description": "An optional dictionary of graphics features and their status." },
                     { "name": "driverBugWorkarounds", "type": "array", "items": { "type": "string" }, "description": "An optional array of GPU driver bug workarounds." }
                 ],
                 "description": "Provides information about the GPU(s) on the system."