Printing: Push checking of |context| one level lower, as the different

platforms have different expectations at this level.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/3475021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60704 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/printing/print_job_worker.cc

@@ -263,9 +263,7 @@ void PrintJobWorker::OnDocumentDone() {
 void PrintJobWorker::SpoolPage(PrintedPage& page) {
   DCHECK_EQ(message_loop(), MessageLoop::current());
   DCHECK_NE(page_number_, PageNumber::npos());
-#if !defined(OS_MACOSX)
-  DCHECK(printing_context_.context());
-#endif
+
   // Signal everyone that the page is about to be printed.
   NotificationTask* task = new NotificationTask();
   task->Init(owner_,
@@ -280,10 +278,6 @@ void PrintJobWorker::SpoolPage(PrintedPage& page) {
     return;
   }
 
-#if defined(OS_MACOSX)
-  // Context is only valid between NewPage and PageDone, so we only check here.
-  DCHECK(printing_context_.context());
-#endif
   // Actual printing.
   document_->RenderPrintedPage(page, printing_context_.context());
 

printing/printed_document_cairo.cc

@@ -22,6 +22,8 @@ void PrintedDocument::RenderPrintedPage(
   }
 #endif
 
+  DCHECK(context);
+
   NOTIMPLEMENTED();
 }
 

printing/printed_document_mac.cc

@@ -24,6 +24,8 @@ void PrintedDocument::RenderPrintedPage(
   }
 #endif
 
+  DCHECK(context);
+
   const printing::PageSetup& page_setup(
       immutable_.settings_.page_setup_device_units());
   gfx::Rect content_area;

printing/printed_document_win.cc

@@ -46,6 +46,8 @@ void PrintedDocument::RenderPrintedPage(
   }
 #endif
 
+  DCHECK(context);
+
   const printing::PageSetup& page_setup(
       immutable_.settings_.page_setup_device_units());
   gfx::Rect content_area;

printing/printing_context_win.cc

@@ -301,6 +301,8 @@ PrintingContext::Result PrintingContext::NewDocument(
 PrintingContext::Result PrintingContext::NewPage() {
   if (abort_printing_)
     return CANCEL;
+
+  DCHECK(context_);
   DCHECK(in_print_job_);
 
   // Inform the driver that the application is about to begin sending data.