Switch about box to web ui on Windows.

chrome/browser/google/google_update.cc

Index: chrome/browser/google/google_update.cc
diff --git a/chrome/browser/google/google_update.cc b/chrome/browser/google/google_update.cc
index b502f6b13922a0402d52d90be1a99d303de02d10..c1ee52a2a7a372ed2398a9709d7e121eb0975f95 100644
--- a/chrome/browser/google/google_update.cc
+++ b/chrome/browser/google/google_update.cc
@@ -235,21 +235,19 @@ GoogleUpdate::GoogleUpdate()
 GoogleUpdate::~GoogleUpdate() {
 }
 
-void GoogleUpdate::CheckForUpdate(bool install_if_newer,
-                                  views::Widget* window) {
+void GoogleUpdate::CheckForUpdate(bool install_if_newer) {
   // We need to shunt this request over to InitiateGoogleUpdateCheck and have
   // it run in the file thread.
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
       base::Bind(&GoogleUpdate::InitiateGoogleUpdateCheck, this,
-                 install_if_newer, window, MessageLoop::current()));
+                 install_if_newer, MessageLoop::current()));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // GoogleUpdate, private:
 
 void GoogleUpdate::InitiateGoogleUpdateCheck(bool install_if_newer,
-                                             views::Widget* window,
                                              MessageLoop* main_loop) {
   FilePath chrome_exe;
   if (!PathService::Get(base::DIR_EXE, &chrome_exe))
@@ -295,13 +293,8 @@ void GoogleUpdate::InitiateGoogleUpdateCheck(bool install_if_newer,
     if (!install_if_newer) {
       hr = on_demand.CreateInstance(CLSID_OnDemandMachineAppsClass);
     } else {
-      HWND foreground_hwnd = NULL;
-      if (window != NULL) {
-        foreground_hwnd = window->GetNativeWindow();
-      }
-
       hr = CoCreateInstanceAsAdmin(CLSID_OnDemandMachineAppsClass,
-          IID_IGoogleUpdate, foreground_hwnd,
+          IID_IGoogleUpdate, GetForegroundWindow(),

[Ben Goodger (Google), 2012/07/09 22:28:01]

Will this always return the foreground-most window in the current
process/thread? What if this function is called when Chrome isn't active? Is
that possible?

[MAD, 2012/07/10 00:20:09]

Yes, but I think that's OK, it's just that the elevation prompt will be shown on
top of that other app... But maybe it's not what we want?

And note that this also has a small window of opportunity to have
GetForegroundWindow return NULL if we call it as we are losing activation
because the user switches to another app at that time... This would have the
side effect of having the elevation prompt not be shown in the foreground, which
I think is OK.. 

Although, I tried to confirm that there wouldn't be any other problems with
using another process' window as the owner of the elevation prompt, so I'll
change the code to use GetActiveWindow() in the UI thread...

           reinterpret_cast<void**>(on_demand.Receive()));
     }
     system_level = true;