DevTools: improper console.table calls should have fallback

Before, console.table would print an empty message when it could not
produce a table. Now, it follows the spec, which says to fall back to
"logging the argument if it can’t be parsed as tabular".

https://console.spec.whatwg.org/#table

Bug: 895077
Change-Id: I2e9394127321307b2516050270be6cde2e45e7b3
Reviewed-on: https://chromium-review.googlesource.com/c/1327464Reviewed-by: Andrey Lushnikov <lushnikov@chromium.org>
Commit-Queue: Andrey Lushnikov <lushnikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606718}

third_party/WebKit/LayoutTests/http/tests/devtools/console/console-format-table-expected.txt

 Tests console.table.
 
-console-format-table.js:11 
+console-format-table.js:11 null
 console-format-table.js:13 Array of arrays
 HEADER (index) | 0 | 1 | 2 | 
 ROW 1 | 2 | 3 | 
@@ -61,4 +61,6 @@ HEADER (index) | Value | 0 |
 ROW 1 | 
 ROW "foo" | 
 ROW 2 | 
+console-format-table.js:55 Non-standard call should use fallback
+console-format-table.js:56 foo (3) [1, 2, 3]
 

third_party/WebKit/LayoutTests/http/tests/devtools/console/console-format-table.js

@@ -51,6 +51,9 @@
 
       console.log("Deep and shallow array");
       console.table([1, "foo", [2]]);
+
+      console.log("Non-standard call should use fallback");
+      console.table("foo", [1,2,3]);
   `);
 
   ConsoleTestRunner.dumpConsoleMessages();

third_party/blink/renderer/devtools/front_end/console/ConsoleViewMessage.js

@@ -141,7 +141,7 @@ Console.ConsoleViewMessage = class {
     if (table)
       table = this._parameterToRemoteObject(table);
     if (!table || !table.preview)
-      return formattedMessage;
+      return this._buildMessage();
 
     const rawValueColumnSymbol = Symbol('rawValueColumn');
     const columnNames = [];