Code refactoring for angle::BitSet and EXPECT_GL_TRUE/FALSE.

This change refactors two style issues to make it be consistent.
1) This CL uses "using" to replace "typedef" for all angle::BitSet<...>.
2) This CL uses EXPECT_GL_TRUE/FALSE to replace EXPECT_EQ for bool comparison.

BUG=angleproject:2005

Change-Id: I4afad92313ea2457bbfedf80f917a5873d7f29ee
Reviewed-on: https://chromium-review.googlesource.com/795871
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/tests/gl_tests/ProgramPipelineTest.cpp b/src/tests/gl_tests/ProgramPipelineTest.cpp
index 059b503..cff14d3 100644
--- a/src/tests/gl_tests/ProgramPipelineTest.cpp
+++ b/src/tests/gl_tests/ProgramPipelineTest.cpp
@@ -88,21 +88,21 @@
 // Test IsProgramPipeline
 TEST_P(ProgramPipelineTest31, IsProgramPipelineTest)
 {
-    EXPECT_EQ(GL_FALSE, glIsProgramPipeline(0));
+    EXPECT_GL_FALSE(glIsProgramPipeline(0));
     EXPECT_GL_NO_ERROR();
 
-    EXPECT_EQ(GL_FALSE, glIsProgramPipeline(2));
+    EXPECT_GL_FALSE(glIsProgramPipeline(2));
     EXPECT_GL_NO_ERROR();
 
     GLuint pipeline;
     glGenProgramPipelines(1, &pipeline);
     glBindProgramPipeline(pipeline);
-    EXPECT_EQ(GL_TRUE, glIsProgramPipeline(pipeline));
+    EXPECT_GL_TRUE(glIsProgramPipeline(pipeline));
     EXPECT_GL_NO_ERROR();
 
     glBindProgramPipeline(0);
     glDeleteProgramPipelines(1, &pipeline);
-    EXPECT_EQ(GL_FALSE, glIsProgramPipeline(pipeline));
+    EXPECT_GL_FALSE(glIsProgramPipeline(pipeline));
     EXPECT_GL_NO_ERROR();
 }