Prevent crash when using getExtension while a PBO is bound.

gpu/command_buffer/service/program_manager_unittest.cc

Index: gpu/command_buffer/service/program_manager_unittest.cc
diff --git a/gpu/command_buffer/service/program_manager_unittest.cc b/gpu/command_buffer/service/program_manager_unittest.cc
index e9840e97a5512d63ccecf3d215e3504e6cca4767..b37384f6964bce9ffd90fe380b0503d0dd7ac73a 100644
--- a/gpu/command_buffer/service/program_manager_unittest.cc
+++ b/gpu/command_buffer/service/program_manager_unittest.cc
@@ -70,8 +70,12 @@ class ProgramManagerTestBase : public GpuServiceTest {
                  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();