Adding a new SkSurface factory for generating surfaces from the scratch texture pool.

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index c7e343393879798172444314c04534b29394bed1..c480a1f718dac47a5704979c47f8efd4bae8d050 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -220,6 +220,10 @@ size_t GrContext::getGpuTextureCacheBytes() const {
   return fTextureCache->getCachedResourceBytes();
 }
 
+int GrContext::getGpuTextureCacheResourceCount() const {
+  return fTextureCache->getCachedResourceCount();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 
 GrTexture* GrContext::findAndRefTexture(const GrTextureDesc& desc,