Adds a first-run balloon to the Windows notification center.

chrome/browser/ui/views/status_icons/status_tray_win.cc

Index: chrome/browser/ui/views/status_icons/status_tray_win.cc
diff --git a/chrome/browser/ui/views/status_icons/status_tray_win.cc b/chrome/browser/ui/views/status_icons/status_tray_win.cc
index 03797c0769777f22bd7fcb3baee9ab6eaf8e72ee..0ef319793e2f0b6079880a155cb4e9134c01597b 100644
--- a/chrome/browser/ui/views/status_icons/status_tray_win.cc
+++ b/chrome/browser/ui/views/status_icons/status_tray_win.cc
@@ -12,6 +12,8 @@
 #include "win8/util/win8_util.h"
 
 static const UINT kStatusIconMessage = WM_APP + 1;
+// This message is TB_INDETERMINATE, fired when the balloon is clicked.

[Dmitry Titov, 2013/06/21 20:53:40]

Is there a link to msdn or some other source that can be used to verify/update?
Where this knowledge came from? 

[dewittj, 2013/06/21 21:56:51]

Instead, I found the header file and included that properly.

+static const UINT kBalloonClickedMessage = WM_USER + 5;
 
 StatusTrayWin::StatusTrayWin()
     : next_icon_id_(1),
@@ -68,22 +70,32 @@ LRESULT CALLBACK StatusTrayWin::WndProc(HWND hwnd,
     }
     return TRUE;
   } else if (message == kStatusIconMessage) {
+    StatusIconWin* win_icon = NULL;
+
+    // Find the selected status icon.
+    for (StatusIcons::const_iterator i(status_icons().begin());
+         i != status_icons().end();
+         ++i) {
+      StatusIconWin* current_win_icon = static_cast<StatusIconWin*>(*i);
+      if (current_win_icon->icon_id() == wparam) {
+        win_icon = current_win_icon;
+        break;
+      }
+    }
+
     switch (lparam) {
+      case kBalloonClickedMessage:
+        win_icon->HandleBalloonClickEvent();
+        return TRUE;
+
       case WM_LBUTTONDOWN:
       case WM_RBUTTONDOWN:
       case WM_CONTEXTMENU:
         // Walk our icons, find which one was clicked on, and invoke its
         // HandleClickEvent() method.
-        for (StatusIcons::const_iterator i(status_icons().begin());
-             i != status_icons().end(); ++i) {
-          StatusIconWin* win_icon = static_cast<StatusIconWin*>(*i);
-          if (win_icon->icon_id() == wparam) {
-            gfx::Point cursor_pos(
-                gfx::Screen::GetNativeScreen()->GetCursorScreenPoint());
-            win_icon->HandleClickEvent(cursor_pos, lparam == WM_LBUTTONDOWN);
-            break;
-          }
-        }
+        gfx::Point cursor_pos(
+            gfx::Screen::GetNativeScreen()->GetCursorScreenPoint());
+        win_icon->HandleClickEvent(cursor_pos, lparam == WM_LBUTTONDOWN);
         return TRUE;
     }
   }