SkPerlinNoiseShader::CreateTubulenceNoise() is misspelled

Add missing 'r'.

BUG=skia:2329
R=bsalomon@google.com, hcm@google.com, sugoi@chromium.org

Author: siglesias@igalia.com

Review URL: https://codereview.chromium.org/207543008

git-svn-id: http://skia.googlecode.com/svn/trunk@14008 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkPerlinNoiseShader.cpp b/src/effects/SkPerlinNoiseShader.cpp
index 8abbdbd..7494a54 100644
--- a/src/effects/SkPerlinNoiseShader.cpp
+++ b/src/effects/SkPerlinNoiseShader.cpp
@@ -256,7 +256,7 @@
                                             numOctaves, seed, tileSize));
 }
 
-SkShader* SkPerlinNoiseShader::CreateTubulence(SkScalar baseFrequencyX, SkScalar baseFrequencyY,
+SkShader* SkPerlinNoiseShader::CreateTurbulence(SkScalar baseFrequencyX, SkScalar baseFrequencyY,
                                               int numOctaves, SkScalar seed,
                                               const SkISize* tileSize) {
     return SkNEW_ARGS(SkPerlinNoiseShader, (kTurbulence_Type, baseFrequencyX, baseFrequencyY,
@@ -706,7 +706,7 @@
     SkShader* shader = random->nextBool() ?
         SkPerlinNoiseShader::CreateFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves, seed,
                                                 stitchTiles ? &tileSize : NULL) :
-        SkPerlinNoiseShader::CreateTubulence(baseFrequencyX, baseFrequencyY, numOctaves, seed,
+        SkPerlinNoiseShader::CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves, seed,
                                              stitchTiles ? &tileSize : NULL);
 
     SkPaint paint;