Fix flaky LayerTreeHostCopyRequestTestDeleteTexture test.

cc/test/test_gles2_interface.cc

Index: cc/test/test_gles2_interface.cc
diff --git a/cc/test/test_gles2_interface.cc b/cc/test/test_gles2_interface.cc
index a8b27c2d0e41aec7826826bb6032ba9599ba1ee5..c11375a68a7031a9e189b06a31eef77661d48758 100644
--- a/cc/test/test_gles2_interface.cc
+++ b/cc/test/test_gles2_interface.cc
@@ -44,9 +44,7 @@ void TestGLES2Interface::GenQueriesEXT(GLsizei n, GLuint* queries) {
 }
 
 void TestGLES2Interface::DeleteTextures(GLsizei n, const GLuint* textures) {
-  for (GLsizei i = 0; i < n; ++i) {
-    test_context_->deleteTexture(textures[i]);
-  }
+  test_context_->deleteTextures(n, textures);
 }
 
 void TestGLES2Interface::DeleteBuffers(GLsizei n, const GLuint* buffers) {