Compile all fiddle examples locally

Motivation: it would be a good idea if the API documentation examples
were checked into the skia repository, so we could make sure they
compile as part of the commit queue.

Fiddle would make/update a named fiddle each time it gets a new
commit of Skia, extracted from the code in the examples/ directory.
The docs would point at those named fiddles.  Named fiddles have urls
in the form:

    https://fiddle.skia.org/c/@Bitmap_000

Then we would stick a link to the example into the header documentation
like this:

    /** Allocates the pixel memory for the bitmap, given its dimensions
        and SkColorType. Returns true on success, where success means
        either setPixels() or setPixelRef() was called.

        @param bitmap  SkBitmap containing SkImageInfo as input, and
                       SkPixelRef as output
        @return        true if SkPixelRef was allocated

        @example       https://fiddle.skia.org/c/@Bitmap_000
    */
    bool allocPixelRef(SkBitmap* bitmap) override;

There are still around 200 disabled examples that need to be fixed
(these result from API changes since the author left).

Change-Id: I14a31348a9ccaaa31f65424b91e3a3533d2583a7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/198824
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
diff --git a/docs/examples/Path_083.cpp b/docs/examples/Path_083.cpp
new file mode 100644
index 0000000..250d788
--- /dev/null
+++ b/docs/examples/Path_083.cpp
@@ -0,0 +1,28 @@
+// Copyright 2019 Google LLC.
+// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
+#include "fiddle/examples.h"
+// HASH=9202430b3f4f5275af8eec5cc9d7baa8
+REG_FIDDLE(Path_083, 256, 128, false, 0) {
+void draw(SkCanvas* canvas) {
+    const SkPoint arrow[] = { {5, -5}, {15, -5}, {20, 0}, {15, 5}, {5, 5}, {10, 0} };
+    const SkRect rect = {10, 10, 54, 54};
+    SkPaint rectPaint;
+    rectPaint.setAntiAlias(true);
+    rectPaint.setStyle(SkPaint::kStroke_Style);
+    SkPaint arrowPaint(rectPaint);
+    SkPath arrowPath;
+    arrowPath.addPoly(arrow, SK_ARRAY_COUNT(arrow), true);
+    arrowPaint.setPathEffect(SkPath1DPathEffect::Make(arrowPath, 176, 0,
+                             SkPath1DPathEffect::kRotate_Style));
+    for (auto direction : { SkPath::kCW_Direction, SkPath::kCCW_Direction } ) {
+        for (unsigned start : { 0, 1, 2, 3 } ) {
+           SkPath path;
+           path.addRect(rect, direction, start);
+           canvas->drawPath(path, rectPaint);
+           canvas->drawPath(path, arrowPaint);
+           canvas->translate(64, 0);
+       }
+       canvas->translate(-256, 64);
+    }
+}
+}  // END FIDDLE