Implement Input Method related WebPlugin interface for browser plugin

content/renderer/browser_plugin/browser_plugin.cc

Index: content/renderer/browser_plugin/browser_plugin.cc
diff --git a/content/renderer/browser_plugin/browser_plugin.cc b/content/renderer/browser_plugin/browser_plugin.cc
index 0bc0f04e9e05cc27ef665189b1e7c15276a19882..ce2ebc045234c37beb5ac0c0cc2729ad3517f377 100644
--- a/content/renderer/browser_plugin/browser_plugin.cc
+++ b/content/renderer/browser_plugin/browser_plugin.cc
@@ -37,6 +37,7 @@
 #include "third_party/WebKit/public/web/WebPluginParams.h"
 #include "third_party/WebKit/public/web/WebScriptSource.h"
 #include "third_party/WebKit/public/web/WebView.h"
+#include "third_party/WebKit/public/web/WebWidget.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
 #if defined (OS_WIN)
@@ -965,6 +966,10 @@ bool BrowserPlugin::supportsEditCommands() const {
   return true;
 }
 
+bool BrowserPlugin::supportsInputMethod() const {
+  return true;
+}
+
 bool BrowserPlugin::canProcessDrag() const {
   return true;
 }
@@ -1317,6 +1322,43 @@ bool BrowserPlugin::executeEditCommand(const blink::WebString& name,
   return true;
 }
 
+bool BrowserPlugin::setComposition(
+    const blink::WebString& text,
+    const blink::WebVector<blink::WebCompositionUnderline>& underlines,
+    int selectionStart,
+    int selectionEnd) {
+  if (!HasGuestInstanceID())
+    return false;
+  std::vector<blink::WebCompositionUnderline> std_underlines;
+  for (size_t i = 0; i < underlines.size(); ++i) {
+    std_underlines.push_back(underlines[i]);
+  }
+  browser_plugin_manager()->Send(new BrowserPluginHostMsg_ImeSetComposition(
+      render_view_routing_id_,
+      guest_instance_id_,
+      text.utf8(),
+      std_underlines,
+      selectionStart,
+      selectionEnd));
+  // TODO(kochi): This assumes the IPC handling always succeeds.
+  return true;
+}
+
+bool BrowserPlugin::confirmComposition(
+    const blink::WebString& text,
+    blink::WebWidget::ConfirmCompositionBehavior selectionBehavior) {
+  if (!HasGuestInstanceID())
+    return false;
+  bool keep_selection = (selectionBehavior == blink::WebWidget::KeepSelection);
+  browser_plugin_manager()->Send(new BrowserPluginHostMsg_ImeConfirmComposition(
+      render_view_routing_id_,
+      guest_instance_id_,
+      text.utf8(),
+      keep_selection));
+  // TODO(kochi): This assumes the IPC handling always succeeds.
+  return true;
+}
+
 void BrowserPlugin::OnLockMouseACK(bool succeeded) {
   mouse_locked_ = succeeded;
   browser_plugin_manager()->Send(new BrowserPluginHostMsg_LockMouse_ACK(