Send Chrome's process id to the app shim.

chrome/common/mac/app_mode_common.mm

 // 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/common/mac/app_mode_common.h"
 
 namespace app_mode {
 
 const char kAppShimSocketName[] = "App Shim Socket";
 
 const char kAppListModeId[] = "app_list";
 
+const char kChromeProcessId[] = "chrome-process-id";
+
 const char kNoLaunchApp[] = "no-launch-app";
 
 NSString* const kCFBundleDisplayNameKey = @"CFBundleDisplayName";
 NSString* const kLSHasLocalizedDisplayNameKey = @"LSHasLocalizedDisplayName";
 NSString* const kBrowserBundleIDKey = @"CrBundleIdentifier";
 NSString* const kCrAppModeShortcutIDKey = @"CrAppModeShortcutID";
 NSString* const kCrAppModeShortcutNameKey = @"CrAppModeShortcutName";
 NSString* const kCrAppModeShortcutURLKey = @"CrAppModeShortcutURL";
 NSString* const kCrAppModeUserDataDirKey = @"CrAppModeUserDataDir";
 NSString* const kCrAppModeProfileDirKey = @"CrAppModeProfileDir";
@@ skipping 11 matching lines @@
     : major_version(0),
       minor_version(0),
       argc(0),
       argv(0) {
 }
 
 ChromeAppModeInfo::~ChromeAppModeInfo() {
 }
 
 }  // namespace app_mode