Select elements should clear type-ahead session on blur.

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 2161 matching lines @@
     if (!node || !isHTMLSelectElement(*node))
         return false;
 
     HTMLSelectElement& select = toHTMLSelectElement(*node);
     if (itemIndex < 0 || static_cast<size_t>(itemIndex) >= select.listItems().size())
         return false;
     const ComputedStyle* itemStyle = select.itemComputedStyle(*select.listItems()[itemIndex]);
     return itemStyle ? itemStyle->font().fontMetrics().height() : 0;
 }
 
+void Internals::resetTypeAheadSession(HTMLSelectElement* select)
+{
+    ASSERT(select);
+    select->resetTypeAheadSessionForTesting();
+}
+
 bool Internals::loseSharedGraphicsContext3D()
 {
     OwnPtr<WebGraphicsContext3DProvider> sharedProvider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
     if (!sharedProvider)
         return false;
     WebGraphicsContext3D* sharedContext = sharedProvider->context3d();
     sharedContext->loseContextCHROMIUM(GL_GUILTY_CONTEXT_RESET_EXT, GL_INNOCENT_CONTEXT_RESET_EXT);
     // To prevent tests that call loseSharedGraphicsContext3D from being
     // flaky, we call finish so that the context is guaranteed to be lost
     // synchronously (i.e. before returning).
@@ skipping 287 matching lines @@
 
     return animator->setScrollbarsVisibleForTesting(visible);
 }
 
 void Internals::forceRestrictIFramePermissions()
 {
     RuntimeEnabledFeatures::setRestrictIFramePermissionsEnabled(true);
 }
 
 } // namespace blink