Fixing some warnings on Linux

bench/benchmain.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "BenchTimer.h"
@@ skipping 658 matching lines @@
                 continue;
             }
             runOnce = true;
 
             int configIndex = configs[x];
 
             outConfig = gConfigs[configIndex].fConfig;
             configName = gConfigs[configIndex].fName;
             backend = gConfigs[configIndex].fBackend;
             GrContext* context = NULL;
-            SkGLContextHelper* glContext = NULL;
             BenchTimer* timer = timers[configIndex];
 
 #if SK_SUPPORT_GPU
+            SkGLContextHelper* glContext = NULL;
             if (kGPU_Backend == backend) {
                 context = gContextFactory.get(gConfigs[configIndex].fContextType);
                 if (NULL == context) {
                     continue;
                 }
                 glContext = gContextFactory.getGLContext(gConfigs[configIndex].fContextType);
             }
 #endif
             SkDevice* device = make_device(outConfig, dim, backend, context);
             SkCanvas* canvas = NULL;
@@ skipping 147 matching lines @@
     }
 
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif