Eliminate PS printing edge cases

printing/printing_context.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PRINTING_PRINTING_CONTEXT_H_
 #define PRINTING_PRINTING_CONTEXT_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 93 matching lines @@
   // document.
   virtual Result DocumentDone() = 0;
 
   // Cancels printing. Can be used in a multi-threaded context. Takes effect
   // immediately.
   virtual void Cancel() = 0;
 
   // Releases the native printing context.
   virtual void ReleaseContext() = 0;
 
+  // Sets postscript printing enabled

[Lei Zhang, 2017/02/25 03:03:35]

"Sets if the postscript printing feature is enabled."

+  virtual void SetPostScriptEnabled(bool is_enabled) = 0;

[Lei Zhang, 2017/02/25 03:03:35]

Maybe we should just ifdef this so we don't need dummy implementations on other
platforms.

+
   // Returns the native context used to print.
   virtual skia::NativeDrawingContext context() const = 0;
 
   // Creates an instance of this object. Implementers of this interface should
   // implement this method to create an object of their implementation.
   static std::unique_ptr<PrintingContext> Create(Delegate* delegate);
 
   void set_margin_type(MarginType type);
   void set_is_modifiable(bool is_modifiable);
 
@@ skipping 27 matching lines @@
   // The job id for the current job. The value is 0 if no jobs are active.
   int job_id_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PrintingContext);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_H_