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

chrome/common/text_input_client_messages.h

Index: chrome/common/text_input_client_messages.h
diff --git a/chrome/common/text_input_client_messages.h b/chrome/common/text_input_client_messages.h
new file mode 100644
index 0000000000000000000000000000000000000000..32923b51eb3dce9c3739c2706a3d5a7a90e17378
--- /dev/null
+++ b/chrome/common/text_input_client_messages.h
@@ -0,0 +1,55 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_COMMON_TEXT_INPUT_CLIENT_MESSAGES_H_
+#define CHROME_COMMON_TEXT_INPUT_CLIENT_MESSAGES_H_
+
+#include "ipc/ipc_message_macros.h"
+#include "ui/gfx/rect.h"
+
+#define IPC_MESSAGE_START TextInputClientMsgStart
+
+// Browser -> Renderer Messages ////////////////////////////////////////////////
+// These messages are sent from the browser to the renderer. Each one has a
+// corresponding reply message.
+////////////////////////////////////////////////////////////////////////////////
+
+// Tells the renderer to send back the character index for a point.
+IPC_MESSAGE_ROUTED1(TextInputClientMsg_CharacterIndexForPoint,
+                    gfx::Point)
+
+// Tells the renderer to send back the rectangle for a given character range.
+IPC_MESSAGE_ROUTED2(TextInputClientMsg_FirstRectForCharacterRange,
+                    uint /* location */,
+                    uint /* length */)
+
+// Tells the renderer to send back the text fragment in a given range.
+IPC_MESSAGE_ROUTED2(TextInputClientMsg_StringForRange,
+                    uint /* location */,
+                    uint /* length */)
+
+////////////////////////////////////////////////////////////////////////////////
+
+// Renderer -> Browser Replies /////////////////////////////////////////////////
+// These messages are sent in reply to the above messages.
+////////////////////////////////////////////////////////////////////////////////
+
+// Reply message for TextInputClientMsg_CharacterIndexForPoint.
+IPC_MESSAGE_ROUTED1(TextInputClientReplyMsg_GotCharacterIndexForPoint,
+                    uint /* character index */)
+
+// Reply message for TextInputClientMsg_FirstRectForCharacterRange.
+IPC_MESSAGE_ROUTED1(TextInputClientReplyMsg_GotFirstRectForRange,
+                    gfx::Rect /* frame rectangle */)
+
+// Reply message for TextInputClientMsg_StringForRange.
+IPC_MESSAGE_ROUTED1(TextInputClientReplyMsg_GotStringForRange,
+                    string16 /* NSData-encoded NSAttributedString */)
+
+// Message sent when the IME text composition range changes.
+IPC_MESSAGE_ROUTED2(TextInputClientViewHostMsg_ImeCompositionRangeChanged,
+                    int /* range start */,
+                    int /* range end*/)
+
+#endif  // CHROME_COMMON_TEXT_INPUT_CLIENT_MESSAGES_H_