Implement autocapitalize in Blink to be used by the embedder.

Source/core/html/HTMLTextFormControlElement.h

Index: Source/core/html/HTMLTextFormControlElement.h
diff --git a/Source/core/html/HTMLTextFormControlElement.h b/Source/core/html/HTMLTextFormControlElement.h
index fb0ba4458a5eaa7f0a4af4c9c163db5294782cc9..c06ce4096c6332c98d79d06ae8dca780dbeca03c 100644
--- a/Source/core/html/HTMLTextFormControlElement.h
+++ b/Source/core/html/HTMLTextFormControlElement.h
@@ -81,6 +81,11 @@ public:
     void setSelectionRange(int start, int end, TextFieldSelectionDirection = SelectionHasNoDirection, NeedToDispatchSelectEvent = DispatchSelectEvent, SelectionOption = ChangeSelection);
     PassRefPtrWillBeRawPtr<Range> selection() const;
 
+    virtual bool supportsAutocapitalize() const = 0;
+    virtual const AtomicString& defaultAutocapitalize() const = 0;
+    const AtomicString& autocapitalize() const;
+    void setAutocapitalize(const AtomicString&);
+
     virtual void dispatchFormControlChangeEvent() override final;
 
     virtual String value() const = 0;