Revert of Revert of stop calling SkScalarDiv

src/pdf/SkPDFDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPDFDevice.h"
 
 #include "SkAnnotation.h"
@@ skipping 21 matching lines @@
 #include "SkTextFormatParams.h"
 #include "SkTemplates.h"
 #include "SkTypefacePriv.h"
 
 #define DPI_FOR_RASTER_SCALE_ONE 72
 
 // Utility functions
 
 static void emit_pdf_color(SkColor color, SkWStream* result) {
     SkASSERT(SkColorGetA(color) == 0xFF);  // We handle alpha elsewhere.
-    SkScalar colorMax = SkIntToScalar(0xFF);
-    SkPDFUtils::AppendScalar(
-            SkScalarDiv(SkIntToScalar(SkColorGetR(color)), colorMax), result);
+    SkScalar colorScale = SkScalarInvert(0xFF);
+    SkPDFUtils::AppendScalar(SkColorGetR(color) * colorScale, result);
     result->writeText(" ");
-    SkPDFUtils::AppendScalar(
-            SkScalarDiv(SkIntToScalar(SkColorGetG(color)), colorMax), result);
+    SkPDFUtils::AppendScalar(SkColorGetG(color) * colorScale, result);
     result->writeText(" ");
-    SkPDFUtils::AppendScalar(
-            SkScalarDiv(SkIntToScalar(SkColorGetB(color)), colorMax), result);
+    SkPDFUtils::AppendScalar(SkColorGetB(color) * colorScale, result);
     result->writeText(" ");
 }
 
 static SkPaint calculate_text_paint(const SkPaint& paint) {
     SkPaint result = paint;
     if (result.isFakeBoldText()) {
         SkScalar fakeBoldScale = SkScalarInterpFunc(result.getTextSize(),
                                                     kStdFakeBoldInterpKeys,
                                                     kStdFakeBoldInterpValues,
                                                     kStdFakeBoldInterpLength);
@@ skipping 2083 matching lines @@
         return;
     }
     SkAutoTUnref<SkPDFObject> image(SkPDFBitmap::Create(fCanon, subsetBitmap));
     if (!image) {
         return;
     }
 
     SkPDFUtils::DrawFormXObject(this->addXObjectResource(image.get()),
                                 &content.entry()->fContent);
 }