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_125.cpp b/docs/examples/Path_125.cpp
new file mode 100644
index 0000000..1d353df
--- /dev/null
+++ b/docs/examples/Path_125.cpp
@@ -0,0 +1,31 @@
+// 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=944a80c7ff8c04e1fecc4aec4a47ea60
+REG_FIDDLE(Path_125, 256, 256, true, 0) {
+void draw(SkCanvas* canvas) {
+    SkPath path;
+    path.moveTo(50, 60);
+    path.quadTo(10, 20, 30, 40);
+    path.close();
+    path.lineTo(30, 30);
+    path.conicTo(1, 2, 3, 4, .5f);
+    path.cubicTo(-1, -2, -3, -4, -5, -6);
+    SkPath::RawIter iter(path);
+    const char* verbStr[] =  { "Move", "Line", "Quad", "Conic", "Cubic", "Close", "Done" };
+    const int pointCount[] = {     1 ,     2 ,     3 ,      3 ,      4 ,      1 ,     0  };
+    SkPath::Verb verb;
+    do {
+        SkPoint points[4];
+        verb = iter.next(points);
+        SkDebugf("k%s_Verb ", verbStr[(int) verb]);
+        for (int i = 0; i < pointCount[(int) verb]; ++i) {
+            SkDebugf("{%1.8g, %1.8g}, ", points[i].fX, points[i].fY);
+        }
+        if (SkPath::kConic_Verb == verb) {
+            SkDebugf("weight = %g", iter.conicWeight());
+        }
+        SkDebugf("\n");
+    } while (SkPath::kDone_Verb != verb);
+}
+}  // END FIDDLE