Fix OSK flickering issue

content/renderer/render_view_browsertest.cc

 // Copyright (c) 2012 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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_util.h"
@@ skipping 963 matching lines @@
     // Move the input focus to the first <input> element, where we should
     // activate IMEs.
     ExecuteJavaScriptForTests("document.getElementById('test1').focus();");
     ProcessPendingMessages();
     render_thread_->sink().ClearMessages();
 
     // Update the IME status and verify if our IME backend sends an IPC message
     // to activate IMEs.
     view()->UpdateTextInputState(
         RenderWidget::NO_SHOW_IME, RenderWidget::FROM_NON_IME);
+    ProcessPendingMessages();
     const IPC::Message* msg = render_thread_->sink().GetMessageAt(0);
     EXPECT_TRUE(msg != NULL);
     EXPECT_EQ(ViewHostMsg_TextInputStateChanged::ID, msg->type());
     ViewHostMsg_TextInputStateChanged::Param params;
     ViewHostMsg_TextInputStateChanged::Read(msg, &params);
     ViewHostMsg_TextInputState_Params p = base::get<0>(params);
     ui::TextInputType type = p.type;
     ui::TextInputMode input_mode = p.mode;
     bool can_compose_inline = p.can_compose_inline;
     EXPECT_EQ(ui::TEXT_INPUT_TYPE_TEXT, type);
     EXPECT_EQ(true, can_compose_inline);
 
     // Move the input focus to the second <input> element, where we should
     // de-activate IMEs.
     ExecuteJavaScriptForTests("document.getElementById('test2').focus();");
     ProcessPendingMessages();
     render_thread_->sink().ClearMessages();
 
     // Update the IME status and verify if our IME backend sends an IPC message
     // to de-activate IMEs.
     view()->UpdateTextInputState(
           RenderWidget::NO_SHOW_IME, RenderWidget::FROM_NON_IME);
+    ProcessPendingMessages();
     msg = render_thread_->sink().GetMessageAt(0);
     EXPECT_TRUE(msg != NULL);
     EXPECT_EQ(ViewHostMsg_TextInputStateChanged::ID, msg->type());
     ViewHostMsg_TextInputStateChanged::Read(msg, &params);
     p = base::get<0>(params);
     type = p.type;
     input_mode = p.mode;
     EXPECT_EQ(ui::TEXT_INPUT_TYPE_PASSWORD, type);
 
     for (size_t i = 0; i < arraysize(kInputModeTestCases); i++) {
       const InputModeTestCase* test_case = &kInputModeTestCases[i];
       std::string javascript =
           base::StringPrintf("document.getElementById('%s').focus();",
                              test_case->input_id);
       // Move the input focus to the target <input> element, where we should
       // activate IMEs.
       ExecuteJavaScriptAndReturnIntValue(base::ASCIIToUTF16(javascript), NULL);
       ProcessPendingMessages();
       render_thread_->sink().ClearMessages();
 
       // Update the IME status and verify if our IME backend sends an IPC
       // message to activate IMEs.
       view()->UpdateTextInputState(
           RenderWidget::NO_SHOW_IME, RenderWidget::FROM_NON_IME);
+      ProcessPendingMessages();
       const IPC::Message* msg = render_thread_->sink().GetMessageAt(0);
       EXPECT_TRUE(msg != NULL);
       EXPECT_EQ(ViewHostMsg_TextInputStateChanged::ID, msg->type());
       ViewHostMsg_TextInputStateChanged::Read(msg, &params);
       p = base::get<0>(params);
       type = p.type;
       input_mode = p.mode;
       EXPECT_EQ(test_case->expected_mode, input_mode);
     }
   }
@@ skipping 912 matching lines @@
   ssl_status = view()->GetSSLStatusOfFrame(frame);
   EXPECT_TRUE(net::IsCertStatusError(ssl_status.cert_status));
 }
 
 TEST_F(RenderViewImplTest, MessageOrderInDidChangeSelection) {
   view()->set_send_content_state_immediately(true);
   LoadHTML("<textarea id=\"test\"></textarea>");
 
   view()->handling_input_event_ = true;
   ExecuteJavaScriptForTests("document.getElementById('test').focus();");
+  ProcessPendingMessages();
 
   bool is_input_type_called = false;
   bool is_selection_called = false;
   size_t last_input_type = 0;
   size_t last_selection = 0;
 
   for (size_t i = 0; i < render_thread_->sink().message_count(); ++i) {
     const uint32 type = render_thread_->sink().GetMessageAt(i)->type();
     if (type == ViewHostMsg_TextInputStateChanged::ID) {
       is_input_type_called = true;
@@ skipping 411 matching lines @@
       FROM_HERE,
       base::Bind(&DevToolsAgentTest::CloseWhilePaused, base::Unretained(this)));
   ExecuteJavaScriptForTests("debugger;");
 
   // CloseWhilePaused should resume execution and continue here.
   EXPECT_FALSE(IsPaused());
   Detach();
 }
 
 }  // namespace content