Reland of Extracting placeholder information from Webkit to Blimp

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index e9dbe90de58341429b39ee047da83d78b69cdfd9..b2faebf791fe3579d15507149c6b1978d1ee76a0 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -31,6 +31,7 @@
 #include "content/public/common/context_menu_params.h"
 #include "content/public/common/file_chooser_file_info.h"
 #include "content/public/common/file_chooser_params.h"
+#include "content/public/common/form_field_data.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "content/public/common/javascript_message_type.h"
 #include "content/public/common/page_importance_signals.h"
@@ -520,6 +521,12 @@
   IPC_STRUCT_TRAITS_MEMBER(source)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(content::FormFieldData)
+  IPC_STRUCT_TRAITS_MEMBER(text)
+  IPC_STRUCT_TRAITS_MEMBER(placeholder)
+  IPC_STRUCT_TRAITS_MEMBER(text_input_type)
+IPC_STRUCT_TRAITS_END()
+
 IPC_STRUCT_TRAITS_BEGIN(content::FileChooserFileInfo)
   IPC_STRUCT_TRAITS_MEMBER(file_path)
   IPC_STRUCT_TRAITS_MEMBER(display_name)
@@ -723,6 +730,10 @@
 // will be sent via FrameHostMsg_TextSurroundingSelectionResponse.
 IPC_MESSAGE_ROUTED1(FrameMsg_TextSurroundingSelectionRequest,
                     uint32_t /* max_length */)
+
+// Requests information about currently focused text input element from the
+// renderer.
+IPC_MESSAGE_ROUTED1(FrameMsg_FocusedFormFieldDataRequest, int /* request_id */)
 
 // Tells the renderer to insert a link to the specified stylesheet. This is
 // needed to support navigation transitions.
@@ -1360,6 +1371,12 @@
                     uint32_t, /* startOffset */
                     uint32_t/* endOffset */)
 
+// Response for FrameMsg_FocusedFormFieldDataRequest. Sends info about the
+// currently focused form field.
+IPC_MESSAGE_ROUTED2(FrameHostMsg_FocusedFormFieldDataResponse,
+                    int, /* request_id */
+                    content::FormFieldData /* form field info */)
+
 // Register a new handler for URL requests with the given scheme.
 IPC_MESSAGE_ROUTED4(FrameHostMsg_RegisterProtocolHandler,
                     std::string /* scheme */,