[DevTools] Move Console to v8 inspector.

This patch moves Console domain, console message, storage and console agent to v8 inspector.

Possible follow-ups:
- removing ConsoleMessage from blink;
- migrating from V8StackTrace to V8SourceLocation;
- removing FrameConsole abstraction;
- exposing single entry method for adding message with parameters.

BUG=613882
[email protected] (for includes)

Review-Url: https://codereview.chromium.org/2035653006
Cr-Commit-Position: refs/heads/master@{#403006}

front_end/console/ConsoleView.js

@@ -184,6 +184,8 @@ WebInspector.ConsoleView.prototype = {
      */
     _onMainFrameNavigated: function(event)
     {
+        if (!WebInspector.moduleSetting("preserveConsoleLog").get())
+            return;
         var frame = /** @type {!WebInspector.ResourceTreeFrame} */(event.data);
         WebInspector.console.log(WebInspector.UIString("Navigated to %s", frame.url));
     },