Add sizeInBytes to GrResource, make GrRenderTarget aware of its pixel config

Review URL: http://codereview.appspot.com/4802058/



git-svn-id: http://skia.googlecode.com/svn/trunk@1951 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrTextContext.cpp b/gpu/src/GrTextContext.cpp
index 5d0f9f7..9d69a97 100644
--- a/gpu/src/GrTextContext.cpp
+++ b/gpu/src/GrTextContext.cpp
@@ -277,7 +277,7 @@
                                        NULL);
         }
 
-        int maxQuadVertices = 4 * fContext->getQuadIndexBuffer()->size() / (6 * sizeof(uint16_t));
+        int maxQuadVertices = 4 * fContext->getQuadIndexBuffer()->maxQuads();
         if (fMaxVertices < kMinRequestedVerts) {
             fMaxVertices = kDefaultRequestedVerts;
         } else if (fMaxVertices > maxQuadVertices) {