Fix issue 11006 - any plugin process started by InProcessBrowserTest was...

chrome/browser/plugin_process_host.cc

 // Copyright (c) 2006-2008 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 "build/build_config.h"
 
 #include "chrome/browser/plugin_process_host.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 301 matching lines @@
                              const std::string& activex_clsid,
                              const std::wstring& locale) {
   info_ = info;
   set_name(info_.name);
 
   if (!CreateChannel())
     return false;
 
   // build command line for plugin, we have to quote the plugin's path to deal
   // with spaces.
-  std::wstring exe_path;
-  if (!PathService::Get(base::FILE_EXE, &exe_path))
+  const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
+  std::wstring exe_path =
+      browser_command_line.GetSwitchValue(switches::kBrowserSubprocessPath);
+  if (exe_path.empty() && !PathService::Get(base::FILE_EXE, &exe_path))
     return false;
 
   CommandLine cmd_line(exe_path);
   if (logging::DialogsAreSuppressed())
     cmd_line.AppendSwitch(switches::kNoErrorDialogs);
 
-  const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
-
   // propagate the following switches to the plugin command line (along with
   // any associated values) if present in the browser command line
   static const wchar_t* const switch_names[] = {
     switches::kPluginStartupDialog,
     switches::kNoSandbox,
     switches::kSafePlugins,
     switches::kTestSandbox,
     switches::kUserAgent,
     switches::kDisableBreakpad,
     switches::kFullMemoryCrashReport,
@@ skipping 227 matching lines @@
   DCHECK(MessageLoop::current() ==
          ChromeThread::GetMessageLoop(ChromeThread::IO));
 
   ChromePluginLib *chrome_plugin = ChromePluginLib::Find(info_.path);
   if (chrome_plugin) {
     void *data_ptr = const_cast<void*>(reinterpret_cast<const void*>(&data[0]));
     uint32 data_len = static_cast<uint32>(data.size());
     chrome_plugin->functions().on_message(data_ptr, data_len);
   }
 }