[Reland] Add gl tests to make sure when a buffer is unmapped, all access path generates an INVALID_…

gpu/command_buffer/tests/gl_test_utils.h

Index: gpu/command_buffer/tests/gl_test_utils.h
diff --git a/gpu/command_buffer/tests/gl_test_utils.h b/gpu/command_buffer/tests/gl_test_utils.h
index e2f88f5c2022b0d70c8e40b4638401af7f7c8c60..d4292248285766b79cac5febb3d9f2cd8572fee6 100644
--- a/gpu/command_buffer/tests/gl_test_utils.h
+++ b/gpu/command_buffer/tests/gl_test_utils.h
@@ -10,6 +10,8 @@
 #include <GLES2/gl2.h>
 #include <stdint.h>
 
+#include <vector>
+
 namespace gfx {
 class Size;
 }  // namespace gfx
@@ -47,6 +49,10 @@ class GLTestHelper {
   // Returns the created buffer.
   static GLuint SetupUnitQuad(GLint position_location);
 
+  // Returns a vector of size 2. The first is the array buffer object,
+  // the second is the element array buffer object.
+  static std::vector<GLuint> SetupIndexedUnitQuad(GLint position_location);
+
   // Make a 6 vertex colors.
   // Returns the created buffer.
   static GLuint SetupColorsForUnitQuad(