Remove a "temporary" hack from when ChromeOS generated PDFs with Cairo.

pdf/pdfium/pdfium_engine.cc

Index: pdf/pdfium/pdfium_engine.cc
diff --git a/pdf/pdfium/pdfium_engine.cc b/pdf/pdfium/pdfium_engine.cc
index 6506d8c96b1038af85ffed479c6b7d05e9dcb8c1..b049a14c35cfc68266c7960f9570036f37626d10 100644
--- a/pdf/pdfium/pdfium_engine.cc
+++ b/pdf/pdfium/pdfium_engine.cc
@@ -3885,27 +3885,14 @@ bool PDFiumEngineExports::RenderPDFPageToDC(const void* pdf_buffer,
                     settings.bounds.x() + settings.bounds.width(),
                     settings.bounds.y() + settings.bounds.height());
 
-  // A temporary hack. PDFs generated by Cairo (used by Chrome OS to generate
-  // a PDF output from a webpage) result in very large metafiles and the
-  // rendering using FPDF_RenderPage is incorrect. In this case, render as a
-  // bitmap. Note that this code does not kick in for PDFs printed from Chrome
-  // because in that case we create a temp PDF first before printing and this
-  // temp PDF does not have a creator string that starts with "cairo".
-  bool use_bitmap = false;
-  if (base::StartsWith(GetDocumentMetadata(doc, "Creator"), "cairo",
-                       base::CompareCase::INSENSITIVE_ASCII)) {
-    use_bitmap = true;
-  }
-
-  // Another temporary hack. Some PDFs seems to render very slowly if
-  // FPDF_RenderPage is directly used on a printer DC. I suspect it is
+  // A "temporary" hack. Some PDFs seems to render very slowly if
+  // FPDF_RenderPage() is directly used on a printer DC. I suspect it is
   // because of the code to talk Postscript directly to the printer if
   // the printer supports this. Need to discuss this with PDFium. For now,
   // render to a bitmap and then blit the bitmap to the DC if we have been
   // supplied a printer DC.
   int device_type = GetDeviceCaps(dc, TECHNOLOGY);
-  if (use_bitmap ||
-      (device_type == DT_RASPRINTER) || (device_type == DT_PLOTTER)) {
+  if (device_type == DT_RASPRINTER || device_type == DT_PLOTTER) {
     FPDF_BITMAP bitmap = FPDFBitmap_Create(dest.width(), dest.height(),
                                            FPDFBitmap_BGRx);
       // Clear the bitmap