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/SkGr.cpp b/src/gpu/SkGr.cpp
index 4935d8f..7505d75 100644
--- a/src/gpu/SkGr.cpp
+++ b/src/gpu/SkGr.cpp
@@ -189,7 +189,7 @@
 }
 
 void GrUnlockAndUnrefCachedBitmapTexture(GrTexture* texture) {
-    GrAssert(NULL != texture->getContext());
+    SkASSERT(NULL != texture->getContext());
 
     texture->getContext()->unlockScratchTexture(texture);
     texture->unref();