"NULL !=" = NULL

R=reed@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/544233002
diff --git a/src/image/SkSurface_Gpu.cpp b/src/image/SkSurface_Gpu.cpp
index fab130c..f94dc5b 100644
--- a/src/image/SkSurface_Gpu.cpp
+++ b/src/image/SkSurface_Gpu.cpp
@@ -77,7 +77,7 @@
 void SkSurface_Gpu::onCopyOnWrite(ContentChangeMode mode) {
     GrRenderTarget* rt = fDevice->accessRenderTarget();
     // are we sharing our render target with the image?
-    SkASSERT(NULL != this->getCachedImage());
+    SkASSERT(this->getCachedImage());
     if (rt->asTexture() == SkTextureImageGetTexture(this->getCachedImage())) {
         // We call createCompatibleDevice because it uses the texture cache. This isn't
         // necessarily correct (http://skbug.com/2252), but never using the cache causes
@@ -88,7 +88,7 @@
         if (kRetain_ContentChangeMode == mode) {
             fDevice->context()->copyTexture(rt->asTexture(), newDevice->accessRenderTarget());
         }
-        SkASSERT(NULL != this->getCachedCanvas());
+        SkASSERT(this->getCachedCanvas());
         SkASSERT(this->getCachedCanvas()->getDevice() == fDevice);
 
         this->getCachedCanvas()->setRootDevice(newDevice);