Fix flaky linux panel tests related to active state checks

chrome/browser/ui/panels/old_panel_resize_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 "chrome/browser/ui/panels/old_base_panel_browser_test.h"
 #include "chrome/browser/ui/panels/detached_panel_strip.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
 #include "chrome/browser/ui/panels/panel_resize_controller.h"
 
-// Panel tests are flaking on linux CQ. http://crbug.com/135377
-#if !defined(OS_LINUX)
-
 class OldPanelResizeBrowserTest : public OldBasePanelBrowserTest {
  public:
   OldPanelResizeBrowserTest() : OldBasePanelBrowserTest() {
   }
 
   virtual ~OldPanelResizeBrowserTest() {
   }
 
   virtual void SetUpOnMainThread() OVERRIDE {
     OldBasePanelBrowserTest::SetUpOnMainThread();
@@ skipping 384 matching lines @@
   bounds.set_height(bounds.height() + bounds.y() - mouse_location.y());
   bounds.set_x(mouse_location.x());
   bounds.set_y(mouse_location.y());
   EXPECT_EQ(bounds, panel->GetBounds());
 
   panel_manager->EndResizingByMouse(false);
   EXPECT_EQ(bounds, panel->GetBounds());
 
   panel_manager->CloseAll();
 }
-
-#endif  // !OS_LINUX