Replace uses of GR_DEBUGCODE by SkDEBUGCODE.

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index b6555c47cac669cf254bda7a4bf75559f3c4b6c0..5145b2937313b17e60d118d3a4cee46858c971b6 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -1536,10 +1536,10 @@ bool GrContext::writeRenderTargetPixels(GrRenderTarget* target,
         // handle the unpremul step on the CPU if we couldn't create an effect to do it.
         if (NULL == effect) {
             SkCanvas::Config8888 srcConfig8888, dstConfig8888;
-            GR_DEBUGCODE(bool success = )
+            SkDEBUGCODE(bool success = )
             grconfig_to_config8888(srcConfig, true, &srcConfig8888);
             SkASSERT(success);
-            GR_DEBUGCODE(success = )
+            SkDEBUGCODE(success = )
             grconfig_to_config8888(srcConfig, false, &dstConfig8888);
             SkASSERT(success);
             const uint32_t* src = reinterpret_cast<const uint32_t*>(buffer);