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 d7bb3be941c0002d29ac3341734db0d22653b9a3..641b26e22cb00d585ad44000fd54b6dacd462868 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 +65,15 @@ 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);
@@ -104,6 +100,7 @@ class PrintWebViewHelper
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest,
                            BlockScriptInitiatedPrinting);
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, OnPrintPages);
+  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, PrintWithMediaQuery);
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, PrintLayoutTest);