Switch to sending IME selection updates early.

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index ed0cf62b88434db5495b2057be34758bd697fba2..04d5c098d0822bec5e87499b511eea4701c1b53a 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -1295,10 +1295,6 @@ IPC_MESSAGE_ROUTED2(ViewMsg_SelectPopupMenuItems,
 // ViewMsg_ScrollFocusedEditableNodeIntoView was called.
 IPC_MESSAGE_ROUTED0(ViewMsg_UndoScrollFocusedEditableNodeIntoView)
 
-// This message relays the beginning or end of a batch event in the IME.
-IPC_MESSAGE_ROUTED1(ViewMsg_ImeBatchStateChanged,
-    bool /* is_begin */)
-
 // Notifies the renderer whether hiding/showing the top controls is enabled
 // and whether or not to animate to the proper state.
 IPC_MESSAGE_ROUTED3(ViewMsg_UpdateTopControlsState,
@@ -2310,11 +2306,6 @@ IPC_MESSAGE_ROUTED1(ViewHostMsg_StartContentIntent,
 IPC_MESSAGE_ROUTED1(ViewHostMsg_DidChangeBodyBackgroundColor,
                     uint32  /* bg_color */)
 
-// This message is an ACK that the batch state change has been received by
-// the renderer and all IME related messages should be processed accordingly.
-IPC_MESSAGE_ROUTED1(ViewHostMsg_ImeBatchStateChanged_ACK,
-                    bool /* is_begin */)
-
 // This message runs the MediaCodec for decoding audio for webaudio.
 IPC_MESSAGE_CONTROL3(ViewHostMsg_RunWebAudioMediaCodec,
                      base::SharedMemoryHandle /* encoded_data_handle */,