Fix crash when calling chrome.tabs.move({index:-1}).

chrome/renderer/resources/json_schema.js

Index: chrome/renderer/resources/json_schema.js
diff --git a/chrome/renderer/resources/json_schema.js b/chrome/renderer/resources/json_schema.js
index 8f588b2f45b445aa37138410a8bb5f5e3d1f6efd..ad47748ae0c5bd90f3becc5baefb23e8e9946df5 100644
--- a/chrome/renderer/resources/json_schema.js
+++ b/chrome/renderer/resources/json_schema.js
@@ -405,10 +405,10 @@ chromeHidden.JSONSchemaValidator.prototype.validateNumber = function(
       instance == Number.NEGATIVE_INFINITY )
     this.addError(path, "numberFiniteNotNan", [instance]);
 
-  if (schema.minimum && instance < schema.minimum)
+  if (schema.minimum !== undefined && instance < schema.minimum)
     this.addError(path, "numberMinValue", [schema.minimum]);
 
-  if (schema.maximum && instance > schema.maximum)
+  if (schema.maximum !== undefined && instance > schema.maximum)
     this.addError(path, "numberMaxValue", [schema.maximum]);
 
   // Check for integer values outside of -2^31..2^31-1.