Make chrome.exe rendezvous with existing chrome process earlier.

chrome/app/chrome_exe_main_win.cc

Index: chrome/app/chrome_exe_main_win.cc
diff --git a/chrome/app/chrome_exe_main_win.cc b/chrome/app/chrome_exe_main_win.cc
index 237784d5649622f84f7821ae38db1fe21b19d090..c4264511d031c9856809a7769d9cf7a92d2dc8c1 100644
--- a/chrome/app/chrome_exe_main_win.cc
+++ b/chrome/app/chrome_exe_main_win.cc
@@ -7,9 +7,13 @@
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
+#include "base/files/file_path.h"
 #include "chrome/app/breakpad_win.h"
 #include "chrome/app/client_util.h"
 #include "chrome/app/metro_driver_win.h"
+#include "chrome/browser/chrome_process_finder_win.h"
+#include "chrome/common/chrome_paths_internal.h"
+#include "chrome/common/chrome_switches.h"
 #include "content/public/app/startup_helper_win.h"
 #include "content/public/common/result_codes.h"
 #include "sandbox/win/src/sandbox_factory.h"
@@ -34,12 +38,29 @@ int RunChrome(HINSTANCE instance) {
   return rc;
 }
 
+bool AttemptFastNotify() {
+  // We only support the fast path for the default user data dir.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUserDataDir))

[pastarmovj, 2013/05/01 10:54:09]

You have to check that the UserDataDir policy is not set either because it can
override the path as well and even has priority over the command line switch. 

[koz (OOO until 15th September), 2013/05/09 01:47:42]

Done.

+    return false;
+
+  base::FilePath udd;

[cpu_(ooo_6.6-7.5), 2013/04/30 19:33:37]

udd -> data_dir

[koz (OOO until 15th September), 2013/05/09 01:47:42]

Done.

+  if (!chrome::GetDefaultUserDataDirectory(&udd))
+    return false;
+  HWND chrome = chrome::FindRunningChromeWindow(udd);
+  if (chrome && chrome::AttemptToNotifyRunningChrome(chrome))
+    return true;
+  return false;
+}
+
 int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE prev, wchar_t*, int) {
   // Initialize the commandline singleton from the environment.
   CommandLine::Init(0, NULL);
   // The exit manager is in charge of calling the dtors of singletons.
   base::AtExitManager exit_manager;
 
+  if (AttemptFastNotify())
+    return 0;
+
   MetroDriver metro_driver;
   if (metro_driver.in_metro_mode())
     return metro_driver.RunInMetro(instance, &RunChrome);