[inspector] make console.assert much faster

test/inspector/console/console-assert-expected.txt

Index: test/inspector/console/console-assert-expected.txt
diff --git a/test/inspector/console/console-assert-expected.txt b/test/inspector/console/console-assert-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a49bc6fd5b225a3aca7ae99d6c4e0b7254095187
--- /dev/null
+++ b/test/inspector/console/console-assert-expected.txt
@@ -0,0 +1,51 @@
+Checks for console.assert
+{
+    method : Runtime.consoleAPICalled
+    params : {
+        args : [
+            [0] : {
+                type : string
+                value : console.assert
+            }
+        ]
+        executionContextId : <executionContextId>
+        stackTrace : {
+            callFrames : [
+                [0] : {
+                    columnNumber : 8
+                    functionName : 
+                    lineNumber : 0
+                    scriptId : <scriptId>
+                    url : 

[dgozman, 2016/11/15 17:57:17]

Let's have an url.

+                }
+            ]
+        }
+        timestamp : <timestamp>
+        type : assert
+    }
+}
+{
+    method : Runtime.consoleAPICalled
+    params : {
+        args : [
+            [0] : {
+                type : string
+                value : error
+            }
+        ]
+        executionContextId : <executionContextId>
+        stackTrace : {
+            callFrames : [
+                [0] : {
+                    columnNumber : 8
+                    functionName : 
+                    lineNumber : 0
+                    scriptId : <scriptId>
+                    url : 
+                }
+            ]
+        }
+        timestamp : <timestamp>
+        type : assert
+    }
+}