Add default icon to app_host.exe, and use it in shortcuts during installation.

chrome/browser/extensions/app_host/app_host.rc

 // Microsoft Visual C++ generated resource script.
 //
+#include "app_host_resource.h"
 
 #define APSTUDIO_READONLY_SYMBOLS
 /////////////////////////////////////////////////////////////////////////////
 //
 // Generated from the TEXTINCLUDE 2 resource.
 //
 #define APSTUDIO_HIDDEN_SYMBOLS
 #include "windows.h"
 #undef APSTUDIO_HIDDEN_SYMBOLS
 
 /////////////////////////////////////////////////////////////////////////////
 #undef APSTUDIO_READONLY_SYMBOLS
 
 /////////////////////////////////////////////////////////////////////////////
 // English (U.S.) resources
 
 #if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
 #ifdef _WIN32
 LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
 #pragma code_page(1252)
 #endif //_WIN32
 
 /////////////////////////////////////////////////////////////////////////////
 //
+// Icon
+//
+
+// The application icon should: have the lowest ID, be placed first, and its
+// resource name should be alphabetically less than the name of any other icon
+// resource (http://msdn.microsoft.com/en-us/library/ms997538.aspx).
+// Note: chrome/installer/util/shell_util.cc depends on the order and number of

[erikwright (departed), 2012/11/15 16:35:12]

Is this 'Note: ...' relevant to app_host or only to chrome?

[huangs, 2012/11/15 16:51:39]

Following mini_installer.rc's lead, and simplifying comment, as well as
prefixing icon id with IDI_.

+// icons.  To avoid breaking existing shortcuts, add new icons at the end
+// (following the ordering described above).
+
+// Icon for the App Lancher.
+IDR_APP_HOST_MAIN  ICON  "..\\..\\..\\app\\theme\\app_list.ico"
+
+/////////////////////////////////////////////////////////////////////////////
+//
 // GOOGLEUPDATEAPPLICATIONCOMMANDS is a "well-known" marker resource defined
 // by Omaha. Executables must both be signed by Google and contain the marker
 // in order to expose application commands.
 //
 #define IDR_GOOGLE_UPDATE_APP_COMMANDS_MARKUP 1
 
 IDR_GOOGLE_UPDATE_APP_COMMANDS_MARKUP GOOGLEUPDATEAPPLICATIONCOMMANDS { 1L }
 
 #endif    // English (U.S.) resources
 /////////////////////////////////////////////////////////////////////////////