skia: Add support for CHROMIUM_image backed textures.

src/gpu/GrGpuResource.cpp

Index: src/gpu/GrGpuResource.cpp
diff --git a/src/gpu/GrGpuResource.cpp b/src/gpu/GrGpuResource.cpp
index a227fd2c0f5ad81ece6dda893a43aa621310cd75..6a48c8ddaf68edc24ef8267d76e1d57310703a55 100644
--- a/src/gpu/GrGpuResource.cpp
+++ b/src/gpu/GrGpuResource.cpp
@@ -73,6 +73,10 @@ void GrGpuResource::dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) con
     this->setMemoryBacking(traceMemoryDump, dumpName);
 }
 
+bool GrGpuResource::reuseable() const {
+    return true;
+}
+
 const SkData* GrGpuResource::setCustomData(const SkData* data) {
     SkSafeRef(data);
     fData.reset(data);