fix for valgrind preAbandonGpuContext

src/effects/SkBlurMaskFilter.cpp

Index: src/effects/SkBlurMaskFilter.cpp
diff --git a/src/effects/SkBlurMaskFilter.cpp b/src/effects/SkBlurMaskFilter.cpp
index 491f5983d8c5da29577890d05b38a90ee1b78909..69be419bdfea8a39035ddaa9bb6fd20c45e9d103 100644
--- a/src/effects/SkBlurMaskFilter.cpp
+++ b/src/effects/SkBlurMaskFilter.cpp
@@ -927,9 +927,9 @@ GrFragmentProcessor* GrRRectBlurEffect::Create(GrContext* context, float sigma,
     builder[1] = cornerRadius;
     builder.finish();
 
-    GrTexture *blurNinePatchTexture = context->findAndRefCachedTexture(key);
+    SkAutoTUnref<GrTexture> blurNinePatchTexture(context->findAndRefCachedTexture(key));
 
-    if (NULL == blurNinePatchTexture) {
+    if (!blurNinePatchTexture) {
         SkMask mask;
 
         unsigned int smallRectSide = 2*(blurRadius + cornerRadius) + 1;
@@ -964,20 +964,13 @@ GrFragmentProcessor* GrRRectBlurEffect::Create(GrContext* context, float sigma,
         texDesc.fHeight = texSide;
         texDesc.fConfig = kAlpha_8_GrPixelConfig;
 
-        blurNinePatchTexture = context->createTexture(texDesc, true, blurred_mask.fImage, 0);
+        blurNinePatchTexture.reset(context->createTexture(texDesc, true, blurred_mask.fImage, 0));
+        SkMask::FreeImage(blurred_mask.fImage);
         if (!blurNinePatchTexture) {
             return NULL;
         }
         context->addResourceToCache(key, blurNinePatchTexture);
-
-        SkMask::FreeImage(blurred_mask.fImage);
     }
-
-    SkAutoTUnref<GrTexture> blurunref(blurNinePatchTexture);
-    if (NULL == blurNinePatchTexture) {
-        return NULL;
-    }
-
     return SkNEW_ARGS(GrRRectBlurEffect, (sigma, rrect, blurNinePatchTexture));
 }