Makes sure the keyboard typing isn't blocked when InputMethod::OnFocus() is not correctly called.

ui/views/widget/desktop_aura/desktop_native_widget_aura.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/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
@@ skipping 351 matching lines @@
   drag_drop_client_.reset();
 
   aura::client::SetEventClient(host->window(), NULL);
   event_client_.reset();
 }
 
 void DesktopNativeWidgetAura::HandleActivationChanged(bool active) {
   native_widget_delegate_->OnNativeWidgetActivationChanged(active);
   aura::client::ActivationClient* activation_client =
       aura::client::GetActivationClient(host_->window());
-  if (!activation_client)
+  if (!activation_client) {
+    GetInputMethod()->GetLogCollector()->AddString(
+        "Missing OnFocus call when activating due to no activation client.");
     return;
+  }
   if (active) {
     if (GetWidget()->HasFocusManager()) {
       // This function can be called before the focus manager has had a
       // chance to set the focused view. In which case we should get the
       // last focused view.
       View* view_for_activation =
           GetWidget()->GetFocusManager()->GetFocusedView() ?
               GetWidget()->GetFocusManager()->GetFocusedView() :
                   GetWidget()->GetFocusManager()->GetStoredFocusView();
       if (!view_for_activation)
         view_for_activation = GetWidget()->GetRootView();
       activation_client->ActivateWindow(
           view_for_activation->GetWidget()->GetNativeView());
       // Refreshes the focus info to IMF in case that IMF cached the old info
       // about focused text input client when it was "inactive".
       GetInputMethod()->OnFocus();
+    } else {
+      GetInputMethod()->GetLogCollector()->AddString(
+          "Missing OnFocus call when activating due to no focus manager.");
     }
   } else {
     // If we're not active we need to deactivate the corresponding
     // aura::Window. This way if a child widget is active it gets correctly
     // deactivated (child widgets don't get native desktop activation changes,
     // only aura activation changes).
     aura::Window* active_window = activation_client->GetActiveWindow();
     if (active_window) {
       activation_client->DeactivateWindow(active_window);
       GetInputMethod()->OnBlur();
@@ skipping 806 matching lines @@
   if (cursor_reference_count_ == 0) {
     // We are the last DesktopNativeWidgetAura instance, and we are responsible
     // for cleaning up |cursor_manager_|.
     delete cursor_manager_;
     native_cursor_manager_ = NULL;
     cursor_manager_ = NULL;
   }
 }
 
 }  // namespace views