GrContext::copyTexture->GrContext::copySurface. Add a flush writes pixel ops flag.

src/gpu/GrSurface.cpp

Index: src/gpu/GrSurface.cpp
diff --git a/src/gpu/GrSurface.cpp b/src/gpu/GrSurface.cpp
index 37fd73f4f415a82f526a88d018043a1f3bddc3f4..d067f07d0df167512e1259106d52dac4a4bc53b7 100644
--- a/src/gpu/GrSurface.cpp
+++ b/src/gpu/GrSurface.cpp
@@ -48,6 +48,12 @@ bool GrSurface::savePixels(const char* filename) {
     return true;
 }
 
+void GrSurface::flushWrites() {

[robertphillips, 2014/10/02 15:40:40]

Have this guy check if he has writes and then just straight out flush the
context ?

[bsalomon, 2014/10/02 17:34:05]

I think we will want to eventually communicate which object needs to be flushed
down to the flush mechanism so it can do a more minimal flush.

+    if (!this->wasDestroyed()) {
+        this->getContext()->flushSurfaceWrites(this);
+    }
+}
+
 bool GrSurface::hasPendingRead() const {
     const GrTexture* thisTex = this->asTexture();
     if (thisTex && thisTex->internalHasPendingRead()) {