Move RenderViewHost::InsertCSS to RenderFrameHost.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index e5ed7854de36737b4689bfff63944028b94716fe..58ac046f13c97c2f57dbde5f4cfd29c359d11269 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -540,6 +540,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_ContextMenuClosed, OnContextMenuClosed)
     IPC_MESSAGE_HANDLER(FrameMsg_CustomContextMenuAction,
                         OnCustomContextMenuAction)
+    IPC_MESSAGE_HANDLER(FrameMsg_CSSInsertRequest, OnCSSInsertRequest)
   IPC_END_MESSAGE_MAP_EX()
 
   if (!msg_is_ok) {
@@ -838,6 +839,10 @@ void RenderFrameImpl::OnCustomContextMenuAction(
   }
 }
 
+void RenderFrameImpl::OnCSSInsertRequest(const std::string& css) {
+  frame_->document().insertStyleSheet(WebString::fromUTF8(css));
+}
+
 bool RenderFrameImpl::ShouldUpdateSelectionTextFromContextMenuParams(
     const base::string16& selection_text,
     size_t selection_text_offset,