Fix for valgrind use of uninitialized variable

bench/GLInstancedArraysBench.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Benchmark.h"
 #include "SkCanvas.h"
 #include "SkImageEncoder.h"
 #if SK_SUPPORT_GPU
 #include "GrTest.h"
 #include "gl/GrGLGLSL.h"
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLShaderVar.h"
 #include "gl/GrGLUtil.h"
 #include "glsl/GrGLSLCaps.h"
 #include <stdio.h>
 
 /*
  * This is a native GL benchmark for instanced arrays vs vertex buffer objects.  To benchmark this
  * functionality, we draw n * kDrawMultipier triangles per run.  If this number is less than
  * kNumTri then we do a single draw, either with instances, or drawArrays.  Otherwise we do
  * multiple draws.
  *
  * Additionally, there is a divisor, which if > 0 will act as a multiplier for the number of draws
  * issued.
  */
 class GLInstancedArraysBench : public Benchmark {
+public:
+    GLInstancedArraysBench() : fTexture(0) {}
+
 protected:
     void onPerCanvasPreDraw(SkCanvas* canvas) override;
     virtual void setup(const GrGLContext*)=0;
     void onPerCanvasPostDraw(SkCanvas* canvas) override;
     virtual void teardown(const GrGLInterface*)=0;
 
     static const GrGLuint kScreenWidth = 800;
     static const GrGLuint kScreenHeight = 600;
     static const uint32_t kNumTri = 10000;
     static const uint32_t kVerticesPerTri = 3;
@@ skipping 31 matching lines @@
         kUseInstance_VboSetup,
     };
 
     /*
      * drawDiv will act as a multiplier for the number of draws we issue if > 0. ie, 2 will issue
      * 2x as many draws, 4 will issue 4x as many draws etc.  There is a limit however, which is
      * kDrawMultipier.
      */
     GLCpuPosInstancedArraysBench(VboSetup vboSetup, int32_t drawDiv)
         : fVboSetup(vboSetup)
-        , fDrawDiv(drawDiv) {
+        , fDrawDiv(drawDiv)
+        , fProgram(0)
+        , fVAO(0) {
         fName = VboSetupToStr(vboSetup, fDrawDiv);
     }
 
 protected:
     const char* onGetName() override {
         return fName.c_str();
     }
 
     void setup(const GrGLContext*) override;
     void onDraw(const int loops, SkCanvas* canvas) override;
@@ skipping 610 matching lines @@
 DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 1) )
 DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 1) )
 DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 2) )
 DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 2) )
 DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 4) )
 DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 4) )
 DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 8) )
 DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 8) )
 
 #endif