Remove unnecessary includes in src/pdf/
Use forward declaration more.
BUG=None
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2110033002
Review-Url: https://codereview.chromium.org/2110033002
diff --git a/src/pdf/SkPDFDevice.h b/src/pdf/SkPDFDevice.h
index 9e97f67..4dded73 100644
--- a/src/pdf/SkPDFDevice.h
+++ b/src/pdf/SkPDFDevice.h
@@ -9,22 +9,20 @@
#define SkPDFDevice_DEFINED
#include "SkBitmap.h"
-#include "SkBitmapKey.h"
#include "SkCanvas.h"
#include "SkClipStack.h"
#include "SkData.h"
#include "SkDevice.h"
#include "SkPaint.h"
-#include "SkPath.h"
-#include "SkPicture.h"
#include "SkRect.h"
#include "SkRefCnt.h"
#include "SkStream.h"
#include "SkTDArray.h"
-#include "SkTemplates.h"
#include "SkSinglyLinkedList.h"
+class SkImageBitmap;
+class SkPath;
class SkPDFArray;
class SkPDFCanon;
class SkPDFDevice;
@@ -33,10 +31,7 @@
class SkPDFFont;
class SkPDFFormXObject;
class SkPDFGlyphSetMap;
-class SkPDFGraphicState;
class SkPDFObject;
-class SkPDFShader;
-class SkPDFStream;
class SkRRect;
/** \class SkPDFDevice