Fix for r4201 performance regression (http://code.google.com/p/skia/issues/detail?id=640)

http://codereview.appspot.com/6299060/



git-svn-id: http://skia.googlecode.com/svn/trunk@4212 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index b62e5be..d04a5a1 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -1831,6 +1831,7 @@
         desc.fWidth = bitmap.width();
         desc.fHeight = bitmap.height();
         desc.fConfig = SkGr::BitmapConfig2PixelConfig(bitmap.config());
+        desc.fClientCacheID = key;
 
         entry = ctx->findAndLockTexture(desc, sampler);
         if (NULL == entry.texture()) {