Disable GPU process prelaunching in content_browsertests on Linux. This is causing lots of crashes …

content/test/content_browser_test.cc

 // Copyright (c) 2011 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 "content/test/content_browser_test.h"
 
 #include "base/command_line.h"
 #include "base/debug/stack_trace.h"
 #include "base/file_path.h"
 #include "base/logging.h"
@@ skipping 31 matching lines @@
 ContentBrowserTest::~ContentBrowserTest() {
 }
 
 void ContentBrowserTest::SetUp() {
   shell_main_delegate_.reset(new ShellMainDelegate);
   shell_main_delegate_->PreSandboxStartup();
 
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   command_line->AppendSwitch(switches::kContentBrowserTest);
 
+#if defined(OS_LINUX)
+  // http://crbug.com/139209
+  command_line->AppendSwitch(switches::kDisableGpuProcessPrelaunch);
+#endif
+
   SetUpCommandLine(command_line);
 
 #if defined(OS_MACOSX)
   // See InProcessBrowserTest::PrepareTestCommandLine().
   FilePath subprocess_path;
   PathService::Get(base::FILE_EXE, &subprocess_path);
   subprocess_path = subprocess_path.DirName().DirName();
   DCHECK_EQ(subprocess_path.BaseName().value(), "Contents");
   subprocess_path = subprocess_path.Append(
       "Frameworks/Content Shell Helper.app/Contents/MacOS/Content Shell Helper");
@@ skipping 72 matching lines @@
       static_cast<ShellContentBrowserClient*>(GetContentClient()->browser());
   return Shell::CreateNewWindow(
       browser_client->off_the_record_browser_context(),
       GURL(chrome::kAboutBlankURL),
       NULL,
       MSG_ROUTING_NONE,
       NULL);
 }
 
 }  // namespace content