mac: Add support for asynchronous dictionary lookup

content/common/text_input_client_messages.h

Index: content/common/text_input_client_messages.h
diff --git a/content/common/text_input_client_messages.h b/content/common/text_input_client_messages.h
index 871778f77bf3901f6e41ff52e877a1e65f6c055c..b0d33cd36d2f23d2231d4b92233c02865589add2 100644
--- a/content/common/text_input_client_messages.h
+++ b/content/common/text_input_client_messages.h
@@ -21,6 +21,8 @@
 // corresponding reply message.
 ////////////////////////////////////////////////////////////////////////////////
 
+IPC_MESSAGE_ROUTED1(TextInputClientMsg_StringAtPoint, gfx::Point)
+
 // Tells the renderer to send back the character index for a point.
 IPC_MESSAGE_ROUTED1(TextInputClientMsg_CharacterIndexForPoint,
                     gfx::Point)
@@ -38,6 +40,9 @@ IPC_MESSAGE_ROUTED1(TextInputClientMsg_StringForRange,
 // Renderer -> Browser Replies /////////////////////////////////////////////////
 // These messages are sent in reply to the above messages.
 ////////////////////////////////////////////////////////////////////////////////
+IPC_MESSAGE_ROUTED2(TextInputClientReplyMsg_GotStringAtPoint,
+                    mac::AttributedStringCoder::EncodedString,

[dcheng, 2014/03/17 17:45:04]

Does this compile on non-Mac platforms? I'm surprised it does without this being
protected by an #ifdef.

+                    gfx::Point)
 
 // Reply message for TextInputClientMsg_CharacterIndexForPoint.
 IPC_MESSAGE_ROUTED1(TextInputClientReplyMsg_GotCharacterIndexForPoint,