Explicit control in tools of ANGLE frontend and backend

tests/Test.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef skiatest_Test_DEFINED
 #define skiatest_Test_DEFINED
 
 #include "SkString.h"
@@ skipping 74 matching lines @@
 using GrContextFactoryContextType = int;
 #endif
 
 typedef void GrContextTestFn(Reporter*, const sk_gpu_test::ContextInfo&);
 typedef bool GrContextTypeFilterFn(GrContextFactoryContextType);
 
 extern bool IsGLContextType(GrContextFactoryContextType);
 extern bool IsVulkanContextType(GrContextFactoryContextType);
 extern bool IsRenderingGLContextType(GrContextFactoryContextType);
 extern bool IsNullGLContextType(GrContextFactoryContextType);
-
 void RunWithGPUTestContexts(GrContextTestFn*, GrContextTypeFilterFn*,
                             Reporter*, sk_gpu_test::GrContextFactory*);
 
 /** Timer provides wall-clock duration since its creation. */
 class Timer {
 public:
     /** Starts the timer. */
     Timer();
 
     /** Nanoseconds since creation. */
@@ skipping 81 matching lines @@
     do {                                                                   \
         SkDynamicMemoryWStream testStream;                                 \
         sk_sp<SkDocument> testDoc(SkDocument::MakePDF(&testStream));       \
         if (!testDoc) {                                                    \
             INFOF(REPORTER, "PDF disabled; %s test skipped.", #TEST_NAME); \
             return;                                                        \
         }                                                                  \
     } while (false)
 
 #endif