[Mac] Implement the system dictionary popup by implementing NSTextInput methods.

chrome/browser/renderer_host/render_message_filter.h

Index: chrome/browser/renderer_host/render_message_filter.h
diff --git a/chrome/browser/renderer_host/render_message_filter.h b/chrome/browser/renderer_host/render_message_filter.h
index c4af36770f379d79e99a6225bfeb8f56e975f1e2..1a9a4da3ad4619fd6dcf2ab10d9834eb7b068432 100644
--- a/chrome/browser/renderer_host/render_message_filter.h
+++ b/chrome/browser/renderer_host/render_message_filter.h
@@ -51,6 +51,10 @@ namespace base {
 class SharedMemory;
 }
 
+namespace gfx {
+class Rect;
+}
+
 namespace net {
 class CookieStore;
 }
@@ -196,6 +200,9 @@ class RenderMessageFilter : public BrowserMessageFilter,
   void OnClipboardReadHTML(ui::Clipboard::Buffer buffer, IPC::Message* reply);
 #if defined(OS_MACOSX)
   void OnClipboardFindPboardWriteString(const string16& text);
+  void OnGotCharacterIndexForPoint(const uint index);
+  void OnGotFirstRectForRange(const gfx::Rect& rect);
+  void OnGotStringFromRange(const string16&);
 #endif
   void OnClipboardReadAvailableTypes(ui::Clipboard::Buffer buffer,
                                      IPC::Message* reply);