Try one other thing temporarily to try to determine cause for a flaky test....

chrome/browser/views/find_bar_host_browsertest.cc

 // Copyright (c) 2009 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/keyboard_codes.h"
 #include "base/message_loop.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_window.h"
 #include "chrome/browser/find_bar_controller.h"
 #include "chrome/browser/find_notification_details.h"
@@ skipping 548 matching lines @@
                                          kFwd, kIgnoreCase, &ordinal));
   EXPECT_EQ(1, ordinal);
 
   // Make sure Find box has moved.
   EXPECT_TRUE(GetFindBarWindowInfo(&position, &fully_visible));
   EXPECT_TRUE(fully_visible);
   EXPECT_EQ(start_position.y(), position.y());
   if (start_position.x() == position.x()) {
     // Failure case. Try to gather more data.
     std::string debug_msg = "Position check failed once. ";
+
+    // First see if flushing the message loop has any effect.
+    MessageLoop::current()->RunAllPending();
+
     if (!GetFindBarWindowInfo(&position, &fully_visible)) {
       debug_msg += "Get failed. ";
     } else {
       if (start_position.x() == position.x())
-        debug_msg += "Still the same. ";
+        debug_msg += "Position check failed again. ";
       else
         debug_msg += "They now differ. ";
     }
     // Force the failure.
     EXPECT_STREQ("", debug_msg.c_str());
   }
   EXPECT_NE(start_position.x(), position.x());
 
   // Search for 'Too much' which the Find box is not obscuring.
   EXPECT_EQ(1, ui_test_utils::FindInPage(tab, L"Too much",
@@ skipping 96 matching lines @@
   // backspace, but that's been proven flaky in the past, so we go straight to
   // tab_contents.
   TabContents* tab_contents = browser()->GetSelectedTabContents();
   // Stop the (non-existing) find operation, and clear the selection (which
   // signals the UI is still active).
   tab_contents->StopFinding(true);
   // Make sure the Find UI flag hasn't been cleared, it must be so that the UI
   // still responds to browser window resizing.
   ASSERT_TRUE(tab_contents->find_ui_active());
 }