Prevent crash when using getExtension while a PBO is bound.

gpu/command_buffer/service/program_manager_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/program_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 52 matching lines @@
                                       kMaxDrawBuffers,
                                       kMaxDualSourceDrawBuffers,
                                       kMaxVertexAttribs,
                                       gpu_preferences_,
                                       feature_info_.get()));
   }
   void SetUpBase(const char* gl_version,
                  const char* gl_extensions,
                  FeatureInfo* feature_info = nullptr) {
     GpuServiceTest::SetUpWithGLVersion(gl_version, gl_extensions);
+    ContextType context_type = CONTEXT_TYPE_OPENGLES2;
+    if (feature_info) {

[Zhenyao Mo, 2016/08/31 00:15:19]

nit: You can move if (!feature_info) feature_info = new FeatureInfo() before
this.  Then context_type can just be feature_info->context_type(), hiding the
assumption default context_type is OPENGLES2.

[Kai Ninomiya, 2016/08/31 00:47:59]

Done (not yet uploaded).

+      context_type = feature_info->context_type();
+    }
     TestHelper::SetupFeatureInfoInitExpectationsWithGLVersion(
-        gl_.get(), gl_extensions, "", gl_version);
+        gl_.get(), gl_extensions, "", gl_version, context_type);
     if (!feature_info)
       feature_info = new FeatureInfo();
     feature_info->InitializeForTesting();
     feature_info_ = feature_info;
     SetupProgramManager();
   }
   void SetUp() override {
     // Parameters same as GpuServiceTest::SetUp
     SetUpBase("2.0", "GL_EXT_framebuffer_object");
   }
@@ skipping 2436 matching lines @@
     ProgramManagerDualSourceBlendingES2Test,
     testing::Values(
         make_gl_ext_tuple("3.2",
                           "GL_ARB_draw_buffers GL_ARB_blend_func_extended "
                           "GL_ARB_program_interface_query"),
         make_gl_ext_tuple("opengl es 3.1",
                           "GL_EXT_draw_buffers GL_EXT_blend_func_extended")));
 
 }  // namespace gles2
 }  // namespace gpu