Implement Input Method related WebPlugin interface for browser plugin

content/browser/renderer_host/render_widget_host_view_guest.cc

Index: content/browser/renderer_host/render_widget_host_view_guest.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_guest.cc b/content/browser/renderer_host/render_widget_host_view_guest.cc
index 49562c8dad7e4a074555919d0bfdbbee6bea241d..511efe3bf9f477b1f6cf05b61abba9d1545393cf 100644
--- a/content/browser/renderer_host/render_widget_host_view_guest.cc
+++ b/content/browser/renderer_host/render_widget_host_view_guest.cc
@@ -301,6 +301,7 @@ void RenderWidgetHostViewGuest::TextInputTypeChanged(
     ui::TextInputType type,
     ui::TextInputMode input_mode,
     bool can_compose_inline) {
+  // Forward the information to embedding RWHV.
   RenderWidgetHostViewPort::FromRWHV(
       guest_->GetEmbedderRenderWidgetHostView())->
           TextInputTypeChanged(type, input_mode, can_compose_inline);
@@ -333,7 +334,14 @@ void RenderWidgetHostViewGuest::SelectionChanged(const base::string16& text,
 
 void RenderWidgetHostViewGuest::SelectionBoundsChanged(
     const ViewHostMsg_SelectionBounds_Params& params) {
-  platform_view_->SelectionBoundsChanged(params);
+  RenderWidgetHostViewPort* rwhv = static_cast<RenderWidgetHostViewPort*>(
+      guest_->GetEmbedderRenderWidgetHostView());
+  if (!rwhv)
+    return;
+  ViewHostMsg_SelectionBounds_Params guest_params(params);
+  guest_params.anchor_rect = guest_->ToGuestRect(params.anchor_rect);
+  guest_params.focus_rect = guest_->ToGuestRect(params.focus_rect);
+  rwhv->SelectionBoundsChanged(guest_params);
 }
 
 void RenderWidgetHostViewGuest::ScrollOffsetChanged() {