Implement autocapitalize in Blink to be used by the embedder.

Source/core/html/forms/SearchInputType.cpp

Index: Source/core/html/forms/SearchInputType.cpp
diff --git a/Source/core/html/forms/SearchInputType.cpp b/Source/core/html/forms/SearchInputType.cpp
index b149a803d85247a0eb9a468b5558c36edfe40765..88119c4357d1fd486e0dd246a1756c70880fbe6a 100644
--- a/Source/core/html/forms/SearchInputType.cpp
+++ b/Source/core/html/forms/SearchInputType.cpp
@@ -155,6 +155,11 @@ void SearchInputType::updateView()
     updateCancelButtonVisibility();
 }
 
+TextFieldAutocapitalize SearchInputType::defaultAutocapitalizeValue() const
+{
+    return TextFieldAutocapitalize::Sentences;
+}
+
 void SearchInputType::updateCancelButtonVisibility()
 {
     Element* button = element().closedShadowRoot()->getElementById(ShadowElementNames::clearButton());