Don't run platform diagnostics tool on invalid URLs from the renderer.

chrome/browser/net/net_error_tab_helper_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/net/net_error_tab_helper.h"
 
 #include "chrome/common/render_messages.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "components/error_page/common/net_error_info.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 403 matching lines @@
 // diagnostics tool.
 TEST_F(NetErrorTabHelperTest, SanitizeDiagnosticsUrl) {
   content::RenderFrameHost* rfh = web_contents()->GetMainFrame();
   rfh->OnMessageReceived(ChromeViewHostMsg_RunNetworkDiagnostics(
       rfh->GetRoutingID(),
       GURL("http://foo:bar@somewhere:123/hats?for#goats")));
   EXPECT_EQ(GURL("http://somewhere:123/"),
             tab_helper()->network_diagnostics_url());
 }
 
-// Makes sure that diagnostics aren't run on URLS with non-HTTP/HTTPS schemes.
+// Makes sure that diagnostics aren't run on invalid URLs or URLs with
+// non-HTTP/HTTPS schemes.
 TEST_F(NetErrorTabHelperTest, NoDiagnosticsForNonHttpSchemes) {
   const char* kUrls[] = {
+    "",
+    "http",
     "file:///blah/blah",
     "chrome://blah/",
     "about:blank",
     "file://foo/bar",
   };
 
   for (const char* url : kUrls) {
     content::RenderFrameHost* rfh = web_contents()->GetMainFrame();
     rfh->OnMessageReceived(ChromeViewHostMsg_RunNetworkDiagnostics(
         rfh->GetRoutingID(), GURL(url)));
     EXPECT_EQ(GURL(""), tab_helper()->network_diagnostics_url());
   }
 }