Set the browser window bounds to fit to the Xvfb's size

chrome/test/base/in_process_browser_test.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/test/base/in_process_browser_test.h"
 
+#include "ash/ash_switches.h"
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/path_service.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 209 matching lines @@
   // dir before running any tests.
   ASSERT_TRUE(SetUpUserDataDirectory())
       << "Could not set up user data directory.";
 
 #if defined(OS_CHROMEOS)
   // Make sure that the log directory exists.
   base::FilePath log_dir = logging::GetSessionLogFile(*command_line).DirName();
   base::CreateDirectory(log_dir);
   // Disable IME extension loading to avoid many browser tests failures.
   chromeos::input_method::DisableExtensionLoading();
+  if (!command_line->HasSwitch(ash::switches::kAshHostWindowBounds)) {
+    // Adjusting window location & size so that the ash desktop window fits
+    // inside the Xvfb'x defualt resolution.
+    command_line->AppendSwitchASCII(ash::switches::kAshHostWindowBounds,
+                                    "0+0-1280x800");
+  }
 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_MACOSX)
   // Always use the MockKeychain if OS encription is used (which is when
   // anything sensitive gets stored, including Cookies).  Without this,
   // many tests will hang waiting for a user to approve KeyChain access.
   OSCrypt::UseMockKeychain(true);
 #endif
 
 #if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
@@ skipping 404 matching lines @@
   // On the Mac, this eventually reaches
   // -[BrowserWindowController windowWillClose:], which will post a deferred
   // -autorelease on itself to ultimately destroy the Browser object. The line
   // below is necessary to pump these pending messages to ensure all Browsers
   // get deleted.
   content::RunAllPendingInMessageLoop();
   delete autorelease_pool_;
   autorelease_pool_ = NULL;
 #endif
 }