pdfviewer: remove save/restore used with q/Q operators (we already do there save and restore)

experimental/PdfViewer/SkPdfRenderer.cpp

Index: experimental/PdfViewer/SkPdfRenderer.cpp
===================================================================
--- experimental/PdfViewer/SkPdfRenderer.cpp	(revision 10630)
+++ experimental/PdfViewer/SkPdfRenderer.cpp	(working copy)
@@ -725,9 +725,7 @@
 
     PdfOp_q(pdfContext, canvas, NULL);
 
-    canvas->save();
 
-
     if (skobj->Resources(pdfContext->fPdfDoc)) {
         pdfContext->fGraphicsState.fResources = skobj->Resources(pdfContext->fPdfDoc);
     }
@@ -777,7 +775,6 @@
         canvas->restore();
     }
 
-    canvas->restore();
     PdfOp_Q(pdfContext, canvas, NULL);
     return kPartial_PdfResult;
 }
@@ -795,9 +792,7 @@
 
     PdfOp_q(pdfContext, canvas, NULL);
 
-    canvas->save();
 
-
     if (skobj->Resources(pdfContext->fPdfDoc)) {
         pdfContext->fGraphicsState.fResources = skobj->Resources(pdfContext->fPdfDoc);
     }
@@ -832,7 +827,6 @@
     // TODO(edisonn): should we restore the variable stack at the same state?
     // There could be operands left, that could be consumed by a parent tokenizer when we pop.
 
-    canvas->restore();
     PdfOp_Q(pdfContext, canvas, NULL);
     return kPartial_PdfResult;
 }
@@ -848,7 +842,6 @@
     }
 
     PdfOp_q(pdfContext, canvas, NULL);
-    canvas->save();
 
     pdfContext->fGraphicsState.fMatrixTm.preConcat(matrix);
     pdfContext->fGraphicsState.fMatrixTm.preScale(SkDoubleToScalar(textSize), SkDoubleToScalar(textSize));
@@ -883,7 +876,6 @@
 
     // TODO(edisonn): should we restore the variable stack at the same state?
     // There could be operands left, that could be consumed by a parent tokenizer when we pop.
-    canvas->restore();
     PdfOp_Q(pdfContext, canvas, NULL);
 
     return kPartial_PdfResult;
@@ -1284,7 +1276,6 @@
                 // TODO(edisonn): we can use a shader here, like imageshader to draw fast. ultimately,
                 // if this is not possible, and we are in rasper mode, and the cells don't intersect, we could even have multiple cpus.
 
-                canvas->save();
                 PdfOp_q(pdfContext, canvas, NULL);
 
                 if (evenOdd) {
@@ -1340,7 +1331,6 @@
                 // get xstep, y step, bbox ... for cliping, and bos of the path
 
                 PdfOp_Q(pdfContext, canvas, NULL);
-                canvas->restore();
             } else {
                 paint.setStyle(SkPaint::kFill_Style);
                 if (evenOdd) {