Remove uses of GrAutoScratchTexture.

src/gpu/GrTexture.cpp

Index: src/gpu/GrTexture.cpp
diff --git a/src/gpu/GrTexture.cpp b/src/gpu/GrTexture.cpp
index aac91c585844f52dcc94c28ff8702d27811113ce..c962ba28272db3c4ffce53512faac1620fc09959 100644
--- a/src/gpu/GrTexture.cpp
+++ b/src/gpu/GrTexture.cpp
@@ -67,18 +67,18 @@ bool GrTexture::readPixels(int left, int top, int width, int height,
                                       pixelOpsFlags);
 }
 
-void GrTexture::writePixels(int left, int top, int width, int height,
+bool GrTexture::writePixels(int left, int top, int width, int height,
                             GrPixelConfig config, const void* buffer,
                             size_t rowBytes, uint32_t pixelOpsFlags) {
     // go through context so that all necessary flushing occurs
     GrContext* context = this->getContext();
     if (NULL == context) {
-        return;
+        return false;
     }
-    context->writeTexturePixels(this,
-                                left, top, width, height,
-                                config, buffer, rowBytes,
-                                pixelOpsFlags);
+    return context->writeTexturePixels(this,
+                                       left, top, width, height,
+                                       config, buffer, rowBytes,
+                                       pixelOpsFlags);
 }
 
 void GrTexture::onRelease() {