Fix synchronization in SitePerProcessTextInputManagerTest.SubframeKeyboardEditCommands.

chrome/browser/renderer_host/site_per_process_text_input_browsertest.cc

 // Copyright 2016 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 <vector>
 
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_content_browser_client.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 1097 matching lines @@
 
   GURL frame_url(
       embedded_test_server()->GetURL("b.com", "/page_with_input_field.html"));
   EXPECT_TRUE(NavigateIframeToURL(web_contents, "child0", frame_url));
 
   // Focus the subframe and then its input field.  The return value
   // "input-focus" will be sent once the input field's focus event fires.
   content::RenderFrameHost* child =
       ChildFrameAt(web_contents->GetMainFrame(), 0);
   std::string result;
+  std::string script =
+      "function onInput(e) {"
+      "  domAutomationController.setAutomationId(0);"
+      "  domAutomationController.send(getInputFieldText());"
+      "}"
+      "inputField = document.getElementById('text-field');"
+      "inputField.addEventListener('input', onInput, false);";
+  EXPECT_TRUE(ExecuteScript(child, script));
   EXPECT_TRUE(ExecuteScriptAndExtractString(
       child, "window.focus(); focusInputField();", &result));
   EXPECT_EQ("input-focus", result);
   EXPECT_EQ(child, web_contents->GetFocusedFrame());
 
   // Generate a couple of keystrokes, which will be routed to the subframe.
+  content::DOMMessageQueue msg_queue;
+  std::string reply;
   SimulateKeyPress(web_contents, ui::DomKey::FromCharacter('1'),
                    ui::DomCode::DIGIT1, ui::VKEY_1, false, false, false, false);
+  EXPECT_TRUE(msg_queue.WaitForMessage(&reply));
   SimulateKeyPress(web_contents, ui::DomKey::FromCharacter('2'),
                    ui::DomCode::DIGIT2, ui::VKEY_2, false, false, false, false);
+  EXPECT_TRUE(msg_queue.WaitForMessage(&reply));
 
   // Verify that the input field in the subframe received the keystrokes.
   EXPECT_TRUE(ExecuteScriptAndExtractString(
       child, "window.domAutomationController.send(getInputFieldText());",
       &result));
   EXPECT_EQ("12", result);
 
   // Define and install a test delegate that translates any keystroke to a
   // command to delete all text from current cursor position to the beginning
   // of the line.
@@ skipping 209 matching lines @@
 
   // Closing this WebContents while we still hold on to our TestBrowserClient.
   EXPECT_TRUE(browser()->tab_strip_model()->CloseWebContentsAt(
       1, TabStripModel::CLOSE_USER_GESTURE));
 
   // For the cleanup of the original WebContents in tab index 0.
   content::SetBrowserClientForTesting(old_browser_client);
 }
 #endif  //  defined(MAC_OSX)
 #endif  // !defined(OS_ANDROID)