Add more testing to trusted graphics_3d.

ppapi/tests/test_graphics_3d.h

Index: ppapi/tests/test_graphics_3d.h
===================================================================
--- ppapi/tests/test_graphics_3d.h	(revision 142004)
+++ ppapi/tests/test_graphics_3d.h	(working copy)
@@ -24,12 +24,15 @@
 
  private:
   // Various tests.
-  std::string TestFrame();
+  std::string TestExtensionsGL();
+  std::string TestFrameGL();
+  std::string TestFramePPAPI();
 
   // Utils used by various tests.
   int32_t SwapBuffersSync(pp::Graphics3D* context);
-  std::string TestPixel(pp::Graphics3D* context,
-                        int x, int y, const uint8_t expected_color[4]);
+  std::string CheckPixelPPAPI(pp::Graphics3D* context,
+                             int x, int y, const uint8_t expected_color[4]);
+  std::string CheckPixelGL(int x, int y, const uint8_t expected_color[4]);
 
   // OpenGL ES2 interface.
   const PPB_OpenGLES2* opengl_es2_;