Reuse PrintContext to excessively triggering matchMedia('print') listeners.

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 82d5e034e4548ade1936d77da43e6ac013fd40a3..1d219627b05405bd110a280d3ccaa5f832dd1992 100644
--- a/chrome/renderer/print_web_view_helper.h
+++ b/chrome/renderer/print_web_view_helper.h
@@ -56,9 +56,7 @@ class PrepareFrameAndViewForPrint {
     return expected_pages_count_;
   }
 
-  bool ShouldUseBrowserOverlays() const {
-    return use_browser_overlays_;
-  }
+  bool ShouldUseBrowserOverlays() const;
 
   const gfx::Size& GetPrintCanvasSize() const {
     return print_canvas_size_;
@@ -67,17 +65,14 @@ class PrepareFrameAndViewForPrint {
   void FinishPrinting();
 
  private:
-  void StartPrinting(const gfx::Size& print_params);
+  void StartPrinting(const gfx::Size& print_params, int dpi);
 
   WebKit::WebFrame* frame_;
-  WebKit::WebNode node_to_print_;
   WebKit::WebView* web_view_;
   gfx::Size print_canvas_size_;
   gfx::Size prev_view_size_;
   gfx::Size prev_scroll_offset_;
-  int dpi_;
   int expected_pages_count_;
-  bool use_browser_overlays_;
   bool finished_;
 
   DISALLOW_COPY_AND_ASSIGN(PrepareFrameAndViewForPrint);