Add early-injection capability to user scripts. I haven't yet

chrome/renderer/render_view.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/render_view.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 1441 matching lines @@
 void RenderView::DidFailLoadWithError(WebView* webview,
                                       const WebError& error,
                                       WebFrame* frame) {
 }
 
 void RenderView::DidFinishDocumentLoadForFrame(WebView* webview,
                                                WebFrame* frame) {
   // Check whether we have new encoding name.
   UpdateEncoding(frame, webview->GetMainFrameEncodingName());
 
-  // Inject any user scripts. Do not inject into chrome UI pages, but do inject
-  // into any other document.
-  const GURL &gurl = frame->GetURL();
-  if (g_render_thread &&  // Will be NULL when testing.
-      (gurl.SchemeIs("file") ||
-       gurl.SchemeIs("http") ||
-       gurl.SchemeIs("https"))) {
-    g_render_thread->user_script_slave()->InjectScripts(frame);
-  }
+  if (g_render_thread)  // Will be NULL when testing.
+    g_render_thread->user_script_slave()->InjectScripts(
+        frame, UserScript::DOCUMENT_END);
 }
 
 void RenderView::DidHandleOnloadEventsForFrame(WebView* webview,
                                                WebFrame* frame) {
 }
 
 void RenderView::DidChangeLocationWithinPageForFrame(WebView* webview,
                                                      WebFrame* frame,
                                                      bool is_new_navigation) {
   DidCommitLoadForFrame(webview, frame, is_new_navigation);
@@ skipping 47 matching lines @@
     external_host_bindings_.set_routing_id(routing_id_);
     external_host_bindings_.BindToJavascript(webframe, L"externalHost");
   }
 
 #ifdef CHROME_PERSONALIZATION
   Personalization::ConfigureRendererPersonalization(personalization_, this,
                                                     routing_id_, webframe);
 #endif
 }
 
+void RenderView::DocumentElementAvailable(WebFrame* frame) {
+  if (g_render_thread)  // Will be NULL when testing.
+    g_render_thread->user_script_slave()->InjectScripts(
+        frame, UserScript::DOCUMENT_START);
+}
+
 WindowOpenDisposition RenderView::DispositionForNavigationAction(
     WebView* webview,
     WebFrame* frame,
     const WebRequest* request,
     WebNavigationType type,
     WindowOpenDisposition disposition,
     bool is_redirect) {
   // Webkit is asking whether to navigate to a new URL.
   // This is fine normally, except if we're showing UI from one security
   // context and they're trying to navigate to a different context.
@@ skipping 1315 matching lines @@
 #if defined(OS_WIN)
   // "t" is the id of the templates root node.
   return jstemplate_builder::GetTemplateHtml(
       template_html, &error_strings, "t");
 #else
   // TODO(port)
   NOTIMPLEMENTED();
   return std::string();
 #endif  // OS_WIN
 }