Fix inspector layout tests to deal send tab via event sender.

components/test_runner/event_sender.cc

 // Copyright 2014 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 "components/test_runner/event_sender.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 1547 matching lines @@
   } else if ("backspace" == code_str ||
              "Backspace" == code_str) {
     code = ui::VKEY_BACK;
     domKeyString.assign("Backspace");
     domCodeString.assign("Backspace");
   } else if ("escape" == code_str ||
              "Escape" == code_str) {
     code = ui::VKEY_ESCAPE;
     domKeyString.assign("Escape");
     domCodeString.assign("Escape");
+  } else if ("Tab" == code_str) {
+    code = ui::VKEY_TAB;
+    domKeyString.assign("Tab");
+    domCodeString.assign("Tab");
   } else {
     // Compare the input string with the function-key names defined by the
     // DOM spec (i.e. "F1",...,"F24"). If the input string is a function-key
     // name, set its key code.
     for (int i = 1; i <= 24; ++i) {
       std::string function_key_name = base::StringPrintf("F%d", i);
       if (function_key_name == code_str) {
         code = ui::VKEY_F1 + (i - 1);
         domKeyString = function_key_name;
         domCodeString = function_key_name;
@@ skipping 1231 matching lines @@
 
 const blink::WebView* EventSender::view() const {
   return web_test_proxy_base_->web_view();
 }
 
 blink::WebView* EventSender::view() {
   return web_test_proxy_base_->web_view();
 }
 
 }  // namespace test_runner