This CL implements the second TODO item of issue 12343:...

chrome/browser/process_singleton_win.cc

Index: chrome/browser/process_singleton_win.cc
===================================================================
--- chrome/browser/process_singleton_win.cc	（版本 21941）
+++ chrome/browser/process_singleton_win.cc	（工作副本）
@@ -20,6 +20,8 @@
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 
+const int ProcessSingleton::kTimeoutInSeconds;
+
 namespace {
 
 // Checks the visibility of the enumerated window and signals once a visible
@@ -78,8 +80,6 @@
 
   AllowSetForegroundWindow(process_id);
 
-  // Gives 20 seconds timeout for the current browser process to respond.
-  const int kTimeout = 20000;
   COPYDATASTRUCT cds;
   cds.dwData = 0;
   cds.cbData = static_cast<DWORD>((to_send.length() + 1) * sizeof(wchar_t));
@@ -90,7 +90,7 @@
                          NULL,
                          reinterpret_cast<LPARAM>(&cds),
                          SMTO_ABORTIFHUNG,
-                         kTimeout,
+                         kTimeoutInSeconds * 1000,
                          &result)) {
     // It is possible that the process owning this window may have died by now.
     if (!result) {