Bug 1648064 - Remove some includes from nsPrintJob.h. r=jwatt

I had needed this before to export that header, and it's no longer
needed, but it seems useful anyways.

Depends on D81989

Differential Revision: https://phabricator.services.mozilla.com/D84252

layout/printing/nsPrintJob.cpp

@@ -451,11 +451,21 @@ NS_IMPL_ISUPPORTS(nsPrintJob, nsIWebProgressListener, nsISupportsWeakReference,
                   nsIObserver)
 
 //-------------------------------------------------------
+nsPrintJob::nsPrintJob() = default;
+
 nsPrintJob::~nsPrintJob() {
   Destroy();  // for insurance
   DisconnectPagePrintTimer();
 }
 
+bool nsPrintJob::CheckBeforeDestroy() const {
+  return mPrt && mPrt->mPreparingForPrint;
+}
+
+PresShell* nsPrintJob::GetPrintPreviewPresShell() {
+  return mPrtPreview->mPrintObject->mPresShell;
+}
+
 //-------------------------------------------------------
 void nsPrintJob::Destroy() {
   if (mIsDestroying) {

layout/printing/nsPrintJob.h

@@ -11,19 +11,22 @@
 
 #include "nsCOMPtr.h"
 
-#include "nsPrintObject.h"
-#include "nsPrintData.h"
-#include "nsFrameList.h"
-#include "nsIWebProgress.h"
-#include "mozilla/dom/HTMLCanvasElement.h"
-#include "nsIFrame.h"  // for WeakFrame only
-#include "nsIWebProgressListener.h"
+#include "nsHashKeys.h"
+#include "nsIFrame.h" // For WeakFrame
+#include "nsSize.h"
+#include "nsTHashtable.h"
 #include "nsWeakReference.h"
 
 // Interfaces
 #include "nsIObserver.h"
+#include "nsIWebProgress.h"
+#include "nsIWebProgressListener.h"
 
 // Classes
+class nsIFrame;
+class nsIPrintProgressParams;
+class nsIPrintSettings;
+class nsPrintData;
 class nsPagePrintTimer;
 class nsIDocShell;
 class nsIDocumentViewerPrint;
@@ -31,6 +34,8 @@ class nsIFrame;
 class nsPrintObject;
 class nsIDocShell;
 class nsPageSequenceFrame;
+class nsPIDOMWindowOuter;
+class nsView;
 
 namespace mozilla {
 class PresShell;
@@ -49,7 +54,7 @@ class nsPrintJob final : public nsIObserver,
  public:
   static void CloseProgressDialog(nsIWebProgressListener* aWebProgressListener);
 
-  nsPrintJob() = default;
+  nsPrintJob();
 
   // nsISupports interface...
   NS_DECL_ISUPPORTS
@@ -140,12 +145,9 @@ class nsPrintJob final : public nsIObserver,
   // object, for example by calling CleanupOnFailure().
   MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult FinishPrintPreview();
   void FirePrintingErrorEvent(nsresult aPrintError);
-  bool CheckBeforeDestroy() const { return mPrt && mPrt->mPreparingForPrint; }
-
-  mozilla::PresShell* GetPrintPreviewPresShell() {
-    return mPrtPreview->mPrintObject->mPresShell;
-  }
 
+  bool CheckBeforeDestroy() const;
+  mozilla::PresShell* GetPrintPreviewPresShell();
   nsresult Cancel();
   void Destroy();
   void DestroyPrintingData();