Added Header and Footer support using Skia

chrome/renderer/print_web_view_helper.h

Index: chrome/renderer/print_web_view_helper.h
diff --git a/chrome/renderer/print_web_view_helper.h b/chrome/renderer/print_web_view_helper.h
index c59029c4a87fed9b8509c3744dc6d585a3a1cf76..0ab1c82bf8a2162bcba5dd7360853c1129ceb6da 100644
--- a/chrome/renderer/print_web_view_helper.h
+++ b/chrome/renderer/print_web_view_helper.h
@@ -25,6 +25,11 @@ struct PrintMsg_PrintPages_Params;
 namespace base {
 class DictionaryValue;
 }
+namespace skia {
+class VectorCanvas;
+class VectorPlatformDeviceSkia;
+}
+template <typename t> class SkRefPtr;
 
 // Class that calls the Begin and End print functions on the frame and changes
 // the size of the view temporarily to support full page printing..
@@ -76,6 +81,15 @@ typedef struct PageSizeMargins {
   double margin_left;
 } PageSizeMargins;
 
+// Given the |device| and |canvas| to draw on, prints the appropriate headers
+// and footers using strings from |header_footer_info| on to the canvas.
+void PrintHeaderAndFooter(skia::VectorPlatformDeviceSkia* device,
+                          const SkRefPtr<skia::VectorCanvas>& canvas,
+                          int page_number, int total_pages,
+                          float webkit_scale_factor,
+                          PageSizeMargins& page_layout_in_points,
+                          const base::DictionaryValue* header_footer_info);
+
 // PrintWebViewHelper handles most of the printing grunt work for RenderView.
 // We plan on making print asynchronous and that will require copying the DOM
 // of the document and creating a new WebView with the contents.
@@ -123,7 +137,11 @@ class PrintWebViewHelper : public RenderViewObserver,
   void OnInitiatePrintPreview();
 
   // Start the process of generating a print preview using |settings|.
-  void OnPrintPreview(const base::DictionaryValue& settings);
+  // |header_footer_info| contains the necessary strings generated by the
+  // browser process to be printed as headers and footers if requested by the
+  // user.
+  void OnPrintPreview(const base::DictionaryValue& settings,
+                      const base::DictionaryValue& header_footer_info);
   // Initialize the print preview document.
   bool CreatePreviewDocument();
 
@@ -206,7 +224,8 @@ class PrintWebViewHelper : public RenderViewObserver,
   void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
                          const gfx::Size& canvas_size,
                          WebKit::WebFrame* frame,
-                         printing::Metafile* metafile);
+                         printing::Metafile* metafile,
+                         bool is_preview);
 #else
   void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
                          const gfx::Size& canvas_size,
@@ -224,7 +243,8 @@ class PrintWebViewHelper : public RenderViewObserver,
 #elif defined(OS_MACOSX)
   void RenderPage(const gfx::Size& page_size, const gfx::Rect& content_area,
                   const float& scale_factor, int page_number,
-                  WebKit::WebFrame* frame, printing::Metafile* metafile);
+                  WebKit::WebFrame* frame, printing::Metafile* metafile,
+                  bool is_preview);
 #elif defined(OS_POSIX)
   bool RenderPages(const PrintMsg_PrintPages_Params& params,
                    WebKit::WebFrame* frame, WebKit::WebNode* node,
@@ -290,6 +310,10 @@ class PrintWebViewHelper : public RenderViewObserver,
 
   scoped_ptr<PrintMsg_PrintPages_Params> old_print_pages_params_;
 
+  // Contains strings generated by the browser process to be printed as headers
+  // and footers if requested by the user.
+  const base::DictionaryValue* header_footer_info_;
+
   // Keeps track of the state of print preview between messages.
   class PrintPreviewContext {
    public: