Add CONTEXT_TYPE_OPENGLES2_PEPPER

cc/test/test_web_graphics_context_3d.h

Index: cc/test/test_web_graphics_context_3d.h
diff --git a/cc/test/test_web_graphics_context_3d.h b/cc/test/test_web_graphics_context_3d.h
index f497ac448cad0dd0aac097a6f95d57f808dbee5c..a913edae55aa24de90f61c9db3dbc9ff5408010e 100644
--- a/cc/test/test_web_graphics_context_3d.h
+++ b/cc/test/test_web_graphics_context_3d.h
@@ -350,6 +350,9 @@ class TestWebGraphicsContext3D {
   void set_support_texture_half_float_linear(bool support) {
     test_capabilities_.gpu.texture_half_float_linear = support;
   }
+  void set_msaa_is_slow(bool msaa_is_slow) {
+    test_capabilities_.gpu.msaa_is_slow = msaa_is_slow;
+  }
 
   // When this context is lost, all contexts in its share group are also lost.
   void add_share_group_context(TestWebGraphicsContext3D* context3d) {