Load visualbench pictures one at a time.

tools/VisualBench.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  */
 
 #ifndef VisualBench_DEFINED
 #define VisualBench_DEFINED
 
 #include "SkWindow.h"
 
 #include "SkPicture.h"
+#include "SkString.h"
 #include "SkSurface.h"
 #include "Timer.h"
 #include "gl/SkGLContext.h"
 
 class GrContext;
 struct GrGLInterface;
 class GrRenderTarget;
 class SkCanvas;
 
 /*
@@ skipping 11 matching lines @@
 
     void onSizeChange() override;
 
 private:
     void setTitle();
     bool setupBackend();
     void resetContext();
     void setupRenderTarget();
     bool onHandleChar(SkUnichar unichar) override;
     void printStats();
-    inline void timePicture(SkCanvas*);
+    bool loadPicture();
+    bool advanceRecordIfNecessary();
     inline void renderFrame(SkCanvas*);
 
-    struct Timing {
-        SkString fName;
+    struct Record {
+        SkString fFilename;
         SkTArray<double> fMeasurements;
     };
 
     enum State {
         kPreWarm_State,
         kTiming_State,
     };
 
     int fLoop;
-    int fCurrentPicture;
+    int fCurrentPictureIdx;
+    SkAutoTUnref<SkPicture> fPicture;
     int fCurrentSample;
-    SkTArray<Timing> fTimings;
-    SkTArray<SkPicture*> fPictures;
+    SkTArray<Record> fRecords;
     WallTimer fTimer;
     State fState;
 
     // support framework
     SkAutoTUnref<SkSurface> fSurface;
     SkAutoTUnref<GrContext> fContext;
     SkAutoTUnref<GrRenderTarget> fRenderTarget;
     AttachmentInfo fAttachmentInfo;
     SkAutoTUnref<const GrGLInterface> fInterface;
 
     typedef SkOSWindow INHERITED;
 };
 
 #endif