Add GrTexture.h include to GrAHardwareBufferImageGenerator.cpp

TBR=bsalomon@google.com
Change-Id: I0cee1dc3f6cdfeaf86d1fbe2eb033c78ff8fe686
Reviewed-on: https://skia-review.googlesource.com/19725
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrAHardwareBufferImageGenerator.cpp b/src/gpu/GrAHardwareBufferImageGenerator.cpp
index 94861d4..06fa584 100644
--- a/src/gpu/GrAHardwareBufferImageGenerator.cpp
+++ b/src/gpu/GrAHardwareBufferImageGenerator.cpp
@@ -17,6 +17,7 @@
 #include "GrContext.h"
 #include "GrContextPriv.h"
 #include "GrResourceProvider.h"
+#include "GrTexture.h"
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>