Select elements should clear type-ahead session on blur.

Source/core/testing/Internals.cpp

Index: Source/core/testing/Internals.cpp
diff --git a/Source/core/testing/Internals.cpp b/Source/core/testing/Internals.cpp
index 7904b658dee7d7d8b6835c345decef3672a5c03a..7d74c1cb827a0993c172a08ae93c9d5e88a1208b 100644
--- a/Source/core/testing/Internals.cpp
+++ b/Source/core/testing/Internals.cpp
@@ -2179,6 +2179,12 @@ int Internals::selectPopupItemStyleFontHeight(Node* node, int 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());