Calculate rough approximations for nvpr path sizes

src/gpu/gl/GrGLPathRange.cpp

Index: src/gpu/gl/GrGLPathRange.cpp
diff --git a/src/gpu/gl/GrGLPathRange.cpp b/src/gpu/gl/GrGLPathRange.cpp
index 5e89cb5d87871941bcc40d6b59a5e9b183547607..9e2b2e73269e667d4f84c8e781bb9cedc61263fa 100644
--- a/src/gpu/gl/GrGLPathRange.cpp
+++ b/src/gpu/gl/GrGLPathRange.cpp
@@ -14,7 +14,7 @@
 GrGLPathRange::GrGLPathRange(GrGpuGL* gpu, size_t size, const SkStrokeRec& stroke)
     : INHERITED(gpu, size, stroke),
       fBasePathID(gpu->pathRendering()->genPaths(fSize)),
-      fNumDefinedPaths(0) {
+      fGpuMemorySize(0) {
 }
 
 GrGLPathRange::~GrGLPathRange() {
@@ -30,8 +30,7 @@ void GrGLPathRange::initAt(size_t index, const SkPath& skPath) {
     // Make sure the path at this index hasn't been initted already.
     SkASSERT(GR_GL_FALSE == gpu->pathRendering()->isPath(fBasePathID + index));
 
-    GrGLPath::InitPathObject(gpu, fBasePathID + index, skPath, fStroke);
-    ++fNumDefinedPaths;
+    fGpuMemorySize += GrGLPath::InitPathObject(gpu, fBasePathID + index, skPath, fStroke);
     this->didChangeGpuMemorySize();
 }