Implement Composition interface for IME API

Source/core/html/ime/InputMethodContext.h

Index: Source/core/html/ime/InputMethodContext.h
diff --git a/Source/core/html/ime/InputMethodContext.h b/Source/core/html/ime/InputMethodContext.h
index e75be3905a97d424d0c7f72f1e8b6ff75406382c..33f72c77d0947ac70ff5c96e9161aed9af98bab3 100644
--- a/Source/core/html/ime/InputMethodContext.h
+++ b/Source/core/html/ime/InputMethodContext.h
@@ -32,6 +32,7 @@
 #define InputMethodContext_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "core/editing/CompositionUnderline.h"
 #include "core/html/HTMLElement.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
@@ -57,9 +58,18 @@ public:
     void setCaretRectangle(Node* anchor, int x, int y, int w, int h);
     void setExclusionRectangle(Node* anchor, int x, int y, int w, int h);
 
+    String getCompositionText() const;

[tkent, 2013/09/11 08:10:55]

Do not add "get" prefix for getter functions.

See 6 of http://www.chromium.org/blink/coding-style#TOC-Names

[kochi, 2013/09/11 08:32:00]

Done.

+    int getSelectionStart() const;
+    int getSelectionEnd() const;
+    const Vector<unsigned>& getSegments();
+
 private:
     InputMethodContext(HTMLElement*);
+    bool hasFocus() const;
+    CompositionUnderline getSelectedSegment() const;
+
     RefPtr<Composition> m_composition;
+    Vector<unsigned> m_segments;
     HTMLElement* m_element;
 };