Replace uses of GrAssert by SkASSERT.

R=bsalomon@google.com

Review URL: https://codereview.chromium.org/22850006

git-svn-id: http://skia.googlecode.com/svn/trunk@10789 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrBlend.cpp b/src/gpu/GrBlend.cpp
index 5d6f472..31e45fa 100644
--- a/src/gpu/GrBlend.cpp
+++ b/src/gpu/GrBlend.cpp
@@ -58,8 +58,8 @@
                                    GrColor dstColor, uint32_t dstCompFlags,
                                    GrColor constantColor) {
 
-    GrAssert(!GrBlendCoeffRefsSrc(*srcCoeff));
-    GrAssert(NULL != srcCoeff);
+    SkASSERT(!GrBlendCoeffRefsSrc(*srcCoeff));
+    SkASSERT(NULL != srcCoeff);
 
     // Check whether srcCoeff can be reduced to kOne or kZero based on known color inputs.
     // We could pick out the coeff r,g,b,a values here and use them to compute the blend term color,