Convert some unit tests from running on GL contexts to running on all contexts

dm/DM.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
@@ skipping 1424 matching lines @@
 bool IsNullGLContextType(int) { return false; }
 #endif
 
 void RunWithGPUTestContexts(GrContextTestFn* test, GrContextTypeFilterFn* contextTypeFilter,
                             Reporter* reporter, GrContextFactory* factory) {
 #if SK_SUPPORT_GPU
 
     for (int typeInt = 0; typeInt < GrContextFactory::kContextTypeCnt; ++typeInt) {
         GrContextFactory::ContextType contextType = (GrContextFactory::ContextType) typeInt;
         ContextInfo ctxInfo = factory->getContextInfo(contextType);
-        if (!(*contextTypeFilter)(contextType)) {
+        if (contextTypeFilter && !(*contextTypeFilter)(contextType)) {
             continue;
         }
         // Use "native" instead of explicitly trying OpenGL and OpenGL ES. Do not use GLES on,
         // desktop since tests do not account for not fixing http://skbug.com/2809
         if (contextType == GrContextFactory::kGL_ContextType ||
             contextType == GrContextFactory::kGLES_ContextType) {
             if (contextType != GrContextFactory::kNativeGL_ContextType) {
                 continue;
             }
         }
         if (ctxInfo.fGrContext) {
             (*test)(reporter, ctxInfo);
         }
         ctxInfo = factory->getContextInfo(contextType,
                                           GrContextFactory::kEnableNVPR_ContextOptions);
         if (ctxInfo.fGrContext) {
             (*test)(reporter, ctxInfo);
         }
     }
 #endif
 }
 } // namespace skiatest
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif