Update from https://crrev.com/309717

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 56c17c097a2c1111bd4876fdcbed5ce81684c84b..0c001d2e52761576ccfe5534a514c2e2036996df 100644
--- a/cc/test/test_web_graphics_context_3d.h
+++ b/cc/test/test_web_graphics_context_3d.h
@@ -248,6 +248,7 @@ class TestWebGraphicsContext3D {
                           GLsizeiptr size,
                           const void* data,
                           GLenum usage);
+  virtual void pixelStorei(GLenum pname, GLint param);
   virtual void* mapBufferCHROMIUM(GLenum target,
                                   GLenum access);
   virtual GLboolean unmapBufferCHROMIUM(GLenum target);
@@ -463,6 +464,7 @@ class TestWebGraphicsContext3D {
   UpdateType last_update_type_;
   unsigned next_insert_sync_point_;
   unsigned last_waited_sync_point_;
+  int unpack_alignment_;
 
   unsigned bound_buffer_;
   TextureTargets texture_targets_;