Re-land: Store and restore view focus in OnWindowFocused.

ui/base/win/foreground_helper.cc

 // 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 "ui/base/win/foreground_helper.h"
 
 #include "base/logging.h"
 #include "ui/gfx/win/window_impl.h"
 
 namespace ui {
@@ skipping 25 matching lines @@
   // If the calling thread is not yet a UI thread, call PeekMessage
   // to ensure creation of its message queue.
   MSG msg = {0};
   PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE);
 
   // Send the Hotkey.
   INPUT hotkey = {0};
   hotkey.type = INPUT_KEYBOARD;
   hotkey.ki.wVk =  VK_F22;
   if (1 != SendInput(1, &hotkey, sizeof(hotkey))) {
-    LOG(WARNING) << "Failed to send input";
+    LOG(WARNING) << "Failed to send input; GetLastError(): " << GetLastError();
     return E_FAIL;
   }
 
   // There are scenarios where the WM_HOTKEY is not dispatched by the
   // the corresponding foreground thread. To prevent us from indefinitely
   // waiting for the hotkey, we set a timer and exit the loop.
   SetTimer(hwnd(), kHotKeyId, kHotKeyWaitTimeout, NULL);
 
   // Loop until we get the key or the timer fires.
   while (GetMessage(&msg, NULL, 0, 0)) {
@@ skipping 14 matching lines @@
 
   return S_OK;
 }
 
 // Handle the registered Hotkey being pressed.
 void ForegroundHelper::OnHotKey(int id, UINT vcode, UINT modifiers) {
   SetForegroundWindow(window_);
 }
 
 }  // namespace ui