PrintPreview: Remove |page_number| from StartPageForVectorCanvas function.

printing/pdf_metafile_cairo_linux.cc

Index: printing/pdf_metafile_cairo_linux.cc
diff --git a/printing/pdf_metafile_cairo_linux.cc b/printing/pdf_metafile_cairo_linux.cc
index 581b15823c78539af7a121a0f871bbce58fdb6da..af2aa5cbf69caee2dc02c47e7571d5e5e437a2d4 100644
--- a/printing/pdf_metafile_cairo_linux.cc
+++ b/printing/pdf_metafile_cairo_linux.cc
@@ -119,8 +119,8 @@ bool PdfMetafileCairo::InitFromData(const void* src_buffer,
 }
 
 SkDevice* PdfMetafileCairo::StartPageForVectorCanvas(
-    int /*page_number*/, const gfx::Size& page_size,
-    const gfx::Rect& content_area, const float& scale_factor) {
+    const gfx::Size& page_size, const gfx::Rect& content_area,
+    const float& scale_factor) {
   if (!StartPage(page_size, content_area, scale_factor))
     return NULL;