PrintPreview: Honor the print media page size and margin values.

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 fba9530d949c2f925f55381b3570493dbbc0ac19..f38fdb45c013df20c63d89322ef4ff544d910ca5 100644
--- a/chrome/renderer/print_web_view_helper.h
+++ b/chrome/renderer/print_web_view_helper.h
@@ -117,6 +117,12 @@ class PrintWebViewHelper
   // Print the document with the print preview frame/node.
   void OnPrintForSystemDialog();
 
+  // Update |ignore_frame_margins_css_| based on settings.
+  void UpdateFrameMarginsCssInfo(const base::DictionaryValue& settings);
+
+  // Returns true if the current destination printer is PRINT_TO_PDF.
+  bool IsPrintToPdfRequested(const base::DictionaryValue& settings);
+
   // Initiate print preview.
   void OnInitiatePrintPreview();
 
@@ -216,12 +222,12 @@ class PrintWebViewHelper
   // |metafile| or a new one.  In either case, the caller owns both |metafile|
   // and the result.
   printing::Metafile* RenderPage(const PrintMsg_Print_Params& params,
-                                 float* scale_factor, int page_number,
+                                 double* scale_factor, int page_number,
                                  bool is_preview, WebKit::WebFrame* frame,
                                  printing::Metafile* metafile);
 #elif defined(OS_MACOSX)
   void RenderPage(const gfx::Size& page_size, const gfx::Rect& content_area,
-                  const float& scale_factor, int page_number,
+                  const double& scale_factor, int page_number,
                   WebKit::WebFrame* frame, bool is_preview,
                   printing::Metafile* metafile);
 #elif defined(OS_POSIX)
@@ -242,13 +248,18 @@ class PrintWebViewHelper
       WebKit::WebFrame* frame,
       int page_index,
       const PrintMsg_Print_Params& default_params,
+      bool ignore_frame_margins_css,
+      bool fit_to_page,
+      double* scale_factor,
       printing::PageSizeMargins* page_layout_in_points);
 
   static void UpdatePrintableSizeInPrintParameters(
       WebKit::WebFrame* frame,
       const WebKit::WebNode& node,
       PrepareFrameAndViewForPrint* prepare,
-      PrintMsg_Print_Params* params);
+      const PrintMsg_Print_Params& params,
+      bool ignore_frame_margins_css,
+      bool fit_to_page);
 
   // Given the |device| and |canvas| to draw on, prints the appropriate headers
   // and footers using strings from |header_footer_info| on to the canvas.
@@ -299,6 +310,11 @@ class PrintWebViewHelper
   scoped_ptr<PrintMsg_PrintPages_Params> print_pages_params_;
   bool is_preview_enabled_;
   bool is_print_ready_metafile_sent_;
+  bool ignore_frame_margins_css_;
+
+  // True if we need to auto fit to page else false.
+  // NOTE: When we print to pdf, we don't fit to page.
+  bool fit_to_page_;
 
   // Used for scripted initiated printing blocking.
   base::Time last_cancelled_script_print_;
@@ -343,7 +359,9 @@ class PrintWebViewHelper
 
     // Create the print preview document. |pages| is empty to print all pages.
     bool CreatePreviewDocument(PrintMsg_Print_Params* params,
-                               const std::vector<int>& pages);
+                               const std::vector<int>& pages,
+                               bool ignore_frame_margins_css,
+                               bool fit_to_page);
 
     // Called after a page gets rendered. |page_time| is how long the
     // rendering took.