DRAFT: Add setKeyboardVisibility API.

ui/keyboard/keyboard_ui_handler.cc

Index: ui/keyboard/keyboard_ui_handler.cc
diff --git a/ui/keyboard/keyboard_ui_handler.cc b/ui/keyboard/keyboard_ui_handler.cc
index 291f3a05f4cee02bf4feb7bbd6b99dd89e0b16dd..2fd1fa13595a34fa1e38a7e5296f6d044f44ced9 100644
--- a/ui/keyboard/keyboard_ui_handler.cc
+++ b/ui/keyboard/keyboard_ui_handler.cc
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/values.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 #include "content/public/browser/web_ui.h"
@@ -26,11 +27,25 @@ KeyboardUIHandler::~KeyboardUIHandler() {
 
 void KeyboardUIHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
+      "setKeyboardVisibility",

[sadrul, 2013/05/14 06:23:19]

Will this be ever used to show the keyboard? i.e. will the keyboard JS be able
to show itself while it was hidden? If it does, what would be the target of the
key events (e.g. no view/window is currently focused, or if the focused
view/window does not accept text input etc.)?

+      base::Bind(&KeyboardUIHandler::HandleSendKeyEventMessage,
+                 base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
       "sendKeyEvent",
       base::Bind(&KeyboardUIHandler::HandleSendKeyEventMessage,
                  base::Unretained(this)));
 }
 
+void KeyboardUIHandler::HandleSetKeyboardVisibility(
+    const base::ListValue* args) {
+  bool visible;
+  if (!args->GetBoolean(0, &visible)) {
+    LOG(ERROR) << "setKeyboardVisibility failed: argument parsing error";
+    return;
+  }
+  // TODO(sadrul): get the KeyboardController without using the Shell

[sadrul, 2013/05/14 06:23:19]

I can't think of a good way of doing this. One option would be to remove the
focus from the currently focused view/window, when the visibility is changing to
hidden.

+}
+
 void KeyboardUIHandler::HandleSendKeyEventMessage(const base::ListValue* args) {
   std::string error;
   scoped_ptr<ui::KeyEvent> event(keyboard::KeyEventFromArgs(args, &error));