Update the SkDocument interface to allow for 1) abort won't emit pdf, 2) close can report success/f…

src/pdf/SkPDFDevice.cpp

Index: src/pdf/SkPDFDevice.cpp
diff --git a/src/pdf/SkPDFDevice.cpp b/src/pdf/SkPDFDevice.cpp
index d13d30cbfb46efbbbe29f6bc3f22522190af75de..933bc32038a9d5aec62b6f52b12dd8ae6ed6bb25 100644
--- a/src/pdf/SkPDFDevice.cpp
+++ b/src/pdf/SkPDFDevice.cpp
@@ -707,6 +707,34 @@ SkPDFDevice::SkPDFDevice(const SkISize& pageSize, const SkISize& contentSize,
     this->init();
 }
 
+SkISize SkSizeToISize(const SkSize& size) {
+    return SkISize::Make(SkScalarRoundToInt(size.width()), SkScalarRoundToInt(size.height()));
+}
+
+SkPDFDevice::SkPDFDevice(const SkSize& trimBox, const SkRect& content)
+    : SkBitmapDevice(makeContentBitmap(SkSizeToISize(SkSize::Make(content.width(), content.height())),
+                                       NULL)),
+      fPageSize(SkSizeToISize(SkSize::Make(content.width(), content.height()))),
+      fContentSize(SkSizeToISize(trimBox)),
+      fLastContentEntry(NULL),
+      fLastMarginContentEntry(NULL),
+      fClipStack(NULL),
+      fEncoder(NULL) {
+    // Skia generally uses the top left as the origin but PDF natively has the
+    // origin at the bottom left. This matrix corrects for that.  But that only
+    // needs to be done once, we don't do it when layering.
+    fInitialTransform.reset();
+    fInitialTransform.setTranslate(0, SkIntToScalar(fPageSize.fHeight));
+    fInitialTransform.preScale(SK_Scalar1, -SK_Scalar1);
+    fInitialTransform.preTranslate(-content.left(), -content.top());
+
+    SkIRect existingClip = SkIRect::MakeWH(this->width(), this->height());
+    fExistingClipRegion.setRect(existingClip);
+
+    this->init();
+}
+
+
 // TODO(vandebo) change layerSize to SkSize.
 SkPDFDevice::SkPDFDevice(const SkISize& layerSize,
                          const SkClipStack& existingClipStack,