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

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index 86ed8f889c80ded0c79d1ed9f527dbf932769243..a7d5393be88a2ceb3cfe57b24ccc4cd0dc117c36 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -14,6 +14,7 @@
 #include "base/bind_helpers.h"
 #include "base/debug/alias.h"
 #include "base/macros.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "base/win/scoped_gdi_object.h"
 #include "base/win/windows_version.h"
@@ -928,8 +929,12 @@ LRESULT HWNDMessageHandler::OnWndProc(UINT message,
       delegate_->HandleDestroyed();
   }
 
-  if (message == WM_ACTIVATE && IsTopLevelWindow(window))
-    PostProcessActivateMessage(LOWORD(w_param), !!HIWORD(w_param));
+  if (message == WM_ACTIVATE) {
+    if (IsTopLevelWindow(window))
+      PostProcessActivateMessage(LOWORD(w_param), !!HIWORD(w_param));
+    else
+      delegate_->AddLog("WM_ACTIVATE on non-top-level window.");
+  }
   return result;
 }
 
@@ -1033,6 +1038,8 @@ void HWNDMessageHandler::PostProcessActivateMessage(int activation_state,
   const bool active = activation_state != WA_INACTIVE && !minimized;
   if (delegate_->CanActivate())
     delegate_->HandleActivationChanged(active);
+  else
+    delegate_->AddLog("Missing call to HandleActivationChanged.");
 }
 
 void HWNDMessageHandler::RestoreEnabledIfNecessary() {
@@ -1231,6 +1238,7 @@ void HWNDMessageHandler::ForceRedrawWindow(int attempts) {
 // Message handlers ------------------------------------------------------------
 
 void HWNDMessageHandler::OnActivateApp(BOOL active, DWORD thread_id) {
+  delegate_->AddLog("WM_ACTIVATEAPP: " + base::IntToString(active));
   if (delegate_->IsWidgetWindow() && !active &&
       thread_id != GetCurrentThreadId()) {
     delegate_->HandleAppDeactivated();
@@ -1486,6 +1494,8 @@ void HWNDMessageHandler::OnInputLangChange(DWORD character_set,
 LRESULT HWNDMessageHandler::OnKeyEvent(UINT message,
                                        WPARAM w_param,
                                        LPARAM l_param) {
+  if (message == WM_KEYDOWN || message == WM_SYSKEYDOWN)
+    delegate_->AddLog("WM_KEYDOWN || WM_SYSKEYDOWN");
   MSG msg = {
       hwnd(), message, w_param, l_param, static_cast<DWORD>(GetMessageTime())};
   ui::KeyEvent key(msg);
@@ -1503,6 +1513,7 @@ void HWNDMessageHandler::OnKillFocus(HWND focused_window) {
 LRESULT HWNDMessageHandler::OnMouseActivate(UINT message,
                                             WPARAM w_param,
                                             LPARAM l_param) {
+  delegate_->AddLog("WM_MOUSEACTIVATE");
   // Please refer to the comments in the header for the touch_down_contexts_
   // member for the if statement below.
   if (touch_down_contexts_)
@@ -1562,6 +1573,7 @@ void HWNDMessageHandler::OnMoving(UINT param, const RECT* new_bounds) {
 LRESULT HWNDMessageHandler::OnNCActivate(UINT message,
                                          WPARAM w_param,
                                          LPARAM l_param) {
+  delegate_->AddLog("WM_NCACTIVATE: " + base::UintToString(w_param));
   // Per MSDN, w_param is either TRUE or FALSE. However, MSDN also hints that:
   // "If the window is minimized when this message is received, the application
   // should pass the message to the DefWindowProc function."