A tricky fix for Issue 1845 (Take 2)....

chrome/browser/renderer_host/render_widget_host_view_win.cc

 // Copyright (c) 2006-2008 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 "chrome/browser/renderer_host/render_widget_host_view_win.h"
 
 #include "base/command_line.h"
 #include "base/gfx/gdi_util.h"
 #include "base/gfx/rect.h"
 #include "base/histogram.h"
@@ skipping 805 matching lines @@
   if (close_on_deactivate_ &&
       (((message == WM_KEYDOWN || message == WM_KEYUP) && (wparam == VK_TAB)) ||
         (message == WM_CHAR && wparam == L'\t'))) {
     DCHECK(parent_hwnd_);
     // First close the pop-up.
     SendMessage(WM_CANCELMODE);
     // Then move the focus by forwarding the tab key to the parent.
     return ::SendMessage(parent_hwnd_, message, wparam, lparam);
   }
 
+  if (wparam == VK_SHIFT || wparam == VK_CONTROL) {
+    // Bug 1845: we need to update the text direction when a user releases
+    // either a right-shift key or a right-control key after pressing both of
+    // them. So, we just update the text direction while a user is pressing the
+    // keys, and we notify the text direction when a user releases either of
+    // them.
+    if (message == WM_KEYDOWN) {
+      const int kKeyDownMask = 0x8000;
+      if ((GetKeyState(VK_RSHIFT) & kKeyDownMask) &&
+          (GetKeyState(VK_RCONTROL) & kKeyDownMask)) {
+        render_widget_host_->UpdateTextDirection(WEB_TEXT_DIRECTION_RTL);
+      } else if ((GetKeyState(VK_LSHIFT) & kKeyDownMask) &&
+                 (GetKeyState(VK_LCONTROL) & kKeyDownMask)) {
+        render_widget_host_->UpdateTextDirection(WEB_TEXT_DIRECTION_LTR);
+      }
+    } else if (message == WM_KEYUP) {
+      render_widget_host_->NotifyTextDirection();
+    }
+  }
+
   render_widget_host_->ForwardKeyboardEvent(
       NativeWebKeyboardEvent(m_hWnd, message, wparam, lparam));
   return 0;
 }
 
 LRESULT RenderWidgetHostViewWin::OnWheelEvent(UINT message, WPARAM wparam,
                                               LPARAM lparam, BOOL& handled) {
   // Workaround for Thinkpad mousewheel driver. We get mouse wheel/scroll
   // messages even if we are not in the foreground. So here we check if
   // we have any owned popup windows in the foreground and dismiss them.
@@ skipping 199 matching lines @@
     // WM_LBUTTONDOWN.
     SetFocus();
   }
 }
 
 void RenderWidgetHostViewWin::ShutdownHost() {
   shutdown_factory_.RevokeAll();
   render_widget_host_->Shutdown();
   // Do not touch any members at this point, |this| has been deleted.
 }