clean up non-ASCII comments

Change-Id: I07ad00133f6a938de70a94024a0ebe36c6c542bb
Reviewed-on: https://skia-review.googlesource.com/6524
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>

bench/nanobench.cpp

@@ -328,7 +328,7 @@ static int setup_cpu_bench(const double overhead, Target* target, Benchmark* ben
     //  -------------------------  < FLAGS_overheadGoal
     //  overhead + N * Bench Time
     //
-    // where bench_plus_overhead ≈ overhead + Bench Time.
+    // where bench_plus_overhead ~=~ overhead + Bench Time.
     //
     // Doing some math, we get:
     //

gm/windowrectangles.cpp

@@ -75,7 +75,7 @@ private:
 };
 
 /**
- * This is a simple helper class for resetting a canvas's clip to our test’s SkClipStack.
+ * This is a simple helper class for resetting a canvas's clip to our test's SkClipStack.
  */
 class ReplayClipStackVisitor final : public SkCanvasClipVisitor {
 public:

include/core/SkDocument.h

@@ -46,7 +46,7 @@ public:
      */
     struct PDFMetadata {
         /**
-         * The document’s title.
+         * The document's title.
          */
         SkString fTitle;
         /**

src/effects/SkDisplacementMapEffect.cpp

@@ -571,7 +571,7 @@ void GrGLDisplacementMapEffect::emitCode(EmitArgs& args) {
     const char* scaleUni = args.fUniformHandler->getUniformCStr(fScaleUni);
     const char* dColor = "dColor";
     const char* cCoords = "cCoords";
-    const char* nearZero = "1e-6"; // Since 6.10352e−5 is the smallest half float, use
+    const char* nearZero = "1e-6"; // Since 6.10352e-5 is the smallest half float, use
                                    // a number smaller than that to approximate 0, but
                                    // leave room for 32-bit float GPU rounding errors.
 

src/pdf/SkPDFMakeCIDGlyphWidthsArray.h

@@ -12,7 +12,7 @@
 class SkBitSet;
 class SkGlyphCache;
 
-/* PDF 32000-1:2008, page 270: "The array’s elements have a variable
+/* PDF 32000-1:2008, page 270: "The array's elements have a variable
    format that can specify individual widths for consecutive CIDs or
    one width for a range of CIDs". */
 sk_sp<SkPDFArray> SkPDFMakeCIDGlyphWidthsArray(SkGlyphCache* cache,

src/pdf/SkPDFMetadata.cpp

@@ -164,7 +164,7 @@ public:
         stream->write(streamBegin, strlen(streamBegin));
         // Do not compress this.  The standard requires that a
         // program that does not understand PDF can grep for
-        // "<?xpacket" and extracť the entire XML.
+        // "<?xpacket" and extract the entire XML.
         stream->write(fXML.c_str(), fXML.size());
         static const char streamEnd[] = "\nendstream";
         stream->write(streamEnd, strlen(streamEnd));

src/ports/SkFontHost_mac.cpp

@@ -780,7 +780,7 @@ CGRGBPixel* Offscreen::getCG(const SkScalerContext_Mac& context, const SkGlyph&
     // Prior to 10.10, CTFontDrawGlyphs acted like CGContextShowGlyphsAtPositions and took
     // 'positions' which are in text space. The glyph location (in device space) must be
     // mapped into text space, so that CG can convert it back into device space.
-    // In 10.10.1, this is handled directly in CTFontDrawGlyphs.
+    // In 10.10.1, this is handled directly in CTFontDrawGlyphs.
     //
     // However, in 10.10.2 color glyphs no longer rotate based on the font transform.
     // So always make the font transform identity and place the transform on the context.