Fix flaky LayerTreeHostCopyRequestTestDeleteTexture test.

cc/test/test_web_graphics_context_3d.cc

Index: cc/test/test_web_graphics_context_3d.cc
diff --git a/cc/test/test_web_graphics_context_3d.cc b/cc/test/test_web_graphics_context_3d.cc
index c8d2191ea47b409e1f125d2bc96ee78bee2b5923..b1a8ae37efe3e569e0646e76a1ab869869298b3f 100644
--- a/cc/test/test_web_graphics_context_3d.cc
+++ b/cc/test/test_web_graphics_context_3d.cc
@@ -184,13 +184,13 @@ void TestWebGraphicsContext3D::genTextures(GLsizei count, GLuint* ids) {
     namespace_->textures.Append(ids[i], new TestTexture());
 }
 
-void TestWebGraphicsContext3D::deleteBuffers(GLsizei count, GLuint* ids) {
+void TestWebGraphicsContext3D::deleteBuffers(GLsizei count, const GLuint* ids) {
   for (int i = 0; i < count; ++i)
     RetireBufferId(ids[i]);
 }
 
-void TestWebGraphicsContext3D::deleteFramebuffers(
-    GLsizei count, GLuint* ids) {
+void TestWebGraphicsContext3D::deleteFramebuffers(GLsizei count,
+                                                  const GLuint* ids) {
   for (int i = 0; i < count; ++i) {
     if (ids[i]) {
       RetireFramebufferId(ids[i]);
@@ -200,13 +200,14 @@ void TestWebGraphicsContext3D::deleteFramebuffers(
   }
 }
 
-void TestWebGraphicsContext3D::deleteRenderbuffers(
-    GLsizei count, GLuint* ids) {
+void TestWebGraphicsContext3D::deleteRenderbuffers(GLsizei count,
+                                                   const GLuint* ids) {
   for (int i = 0; i < count; ++i)
     RetireRenderbufferId(ids[i]);
 }
 
-void TestWebGraphicsContext3D::deleteTextures(GLsizei count, GLuint* ids) {
+void TestWebGraphicsContext3D::deleteTextures(GLsizei count,
+                                              const GLuint* ids) {
   for (int i = 0; i < count; ++i)
     RetireTextureId(ids[i]);
   base::AutoLock lock(namespace_->lock);