3 files changed, 24 insertions, 0 deletions
diff --git a/webkit/glue/webframe.h b/webkit/glue/webframe.h
index 90b1ec8..9be5100 100644
--- a/webkit/glue/webframe.h
+++ b/webkit/glue/webframe.h
@@ -99,6 +99,9 @@ class WebFrame {
   virtual void ExecuteScriptInNewContext(
       const webkit_glue::WebScriptSource* sources, int num_sources) = 0;
 
+  // Inserts the given CSS styles at the beginning of the document.
+  virtual bool InsertCSSStyles(const std::string& css) = 0;
+
   // Returns a string representing the state of the previous page load for
   // later use when loading. The previous page is the page that was loaded
   // before DidCommitLoadForFrame was received.
diff --git a/webkit/glue/webframe_impl.cc b/webkit/glue/webframe_impl.cc
index 9f87b20..5ad4219 100644
--- a/webkit/glue/webframe_impl.cc
+++ b/webkit/glue/webframe_impl.cc
@@ -93,6 +93,7 @@ MSVC_PUSH_WARNING_LEVEL(0);
 #include "GraphicsContext.h"
 #include "HTMLHeadElement.h"
 #include "HTMLLinkElement.h"
+#include "HTMLNames.h"
 #include "HistoryItem.h"
 #include "InspectorController.h"
 #include "markup.h"
@@ -1656,6 +1657,25 @@ void WebFrameImpl::ExecuteScript(const webkit_glue::WebScriptSource& source) {
           source.start_line));
 }
 
+bool WebFrameImpl::InsertCSSStyles(const std::string& css) {
+  Document* document = frame()->document();
+  if (!document)
+    return false;
+  WebCore::Element* document_element = document->documentElement();
+  if (!document_element)
+    return false;
+
+  RefPtr<WebCore::Element> stylesheet = document->createElement(
+      WebCore::HTMLNames::styleTag, false);
+  ExceptionCode err = 0;
+  stylesheet->setTextContent(webkit_glue::StdStringToString(css), err);
+  DCHECK(!err) << "Failed to set style element content";
+  WebCore::Node* first = document_element->firstChild();
+  bool success = document_element->insertBefore(stylesheet, first, err);
+  DCHECK(success) << "Failed to insert stylesheet";
+  return success;
+}
+
 void WebFrameImpl::ExecuteScriptInNewContext(
     const webkit_glue::WebScriptSource* sources_in, int num_sources) {
   Vector<WebCore::ScriptSourceCode> sources;
diff --git a/webkit/glue/webframe_impl.h b/webkit/glue/webframe_impl.h
index c0b4616..96045e1 100644
--- a/webkit/glue/webframe_impl.h
+++ b/webkit/glue/webframe_impl.h
@@ -93,6 +93,7 @@ class WebFrameImpl : public WebFrame, public base::RefCounted<WebFrameImpl> {
   virtual void ExecuteScript(const webkit_glue::WebScriptSource& source);
   virtual void ExecuteScriptInNewContext(
       const webkit_glue::WebScriptSource* sources, int num_sources);
+  virtual bool InsertCSSStyles(const std::string& css);
   virtual bool GetPreviousHistoryState(std::string* history_state) const;
   virtual bool GetCurrentHistoryState(std::string* history_state) const;
   virtual bool HasCurrentHistoryState() const;